CN109992865B - A Method of Processing Elevation in AutoCAD Engineering Drawings - Google Patents

Abstract

The invention relates to the technical field of computer-aided design, and discloses a method for processing elevations in AutoCAD engineering drawings. Through the creation of the present invention, a new method for automatically batch processing elevations in AutoCAD engineering drawings is provided, that is, when creating elevations in elevations, elevation lines, elevation symbols and elevation texts can still be drawn according to the usual drawing habits, It only needs the elevation line and elevation text to meet a specific format, without any restrictions on fonts and elevation symbols, and does not depend on any pre-created attribute blocks, so it can not only automatically process elevations in AutoCAD engineering drawings in batches, reducing man-made Reduce the workload, avoid manual errors, avoid copying garbled characters, greatly improve the efficiency and accuracy of drawing elevations, and facilitate practical promotion and application.

Description

A Method of Processing Elevation in AutoCAD Engineering Drawings

technical field

The invention belongs to the technical field of computer aided drawing, and in particular relates to a method for processing elevation in AutoCAD engineering drawings.

Background technique

In the existing engineering drawing process, AutoCAD (Autodesk Computer Aided Design, which is an automatic computer-aided design software first developed by Autodesk in 1982, is often used for two-dimensional drawing, detailed drawing, design documents and basic three-dimensional design, which has become a widely popular drawing tool in the world) to draw engineering drawings, and it is necessary to mark the elevation in the elevation view of the drawings.

At present, there are two ways to mark the elevation: (1) full manual operation, that is, to calculate the value of each elevation one by one and draw the elevation on the drawing. When the elevation needs to be modified, the numerical value of the elevation is also manually calculated and modified; It can be seen that such an operation method is cumbersome, and it is acceptable when the number of elevations is small. When there are many elevations, in the process of continuous drawing and modification of drawings, the elevations marked manually are prone to errors, and it is not easy to check . (2) Compile plug-ins for calculation and processing, but the current methods all adopt the form of attribute blocks without exception; since a specific plug-in only supports a specific attribute block, when using a certain plug-in, it means that only The elevation style supported by this plug-in leads to limited use; in addition, when copying other people's drawings for modification, there may be a problem that the font does not match and the elevation value is displayed as garbled characters, and if you want to batch process, you can only After querying the elevation processing plug-in used in the original drawing, it can be completed by copying it to the engineer's current computer.

Contents of the invention

In order to solve the problems of cumbersome and error-prone manual marking and limited plug-in marking and garbled characters existing in the existing methods of marking elevations, the purpose of this invention is to provide a new method for automatically batch processing elevations in AutoCAD engineering drawings.

The technical scheme adopted in the present invention is:

A method for processing elevation in AutoCAD engineering drawings, comprising the following steps:

S101. Create several levels in the AutoCAD engineering drawing, and set the level line and level text of each level as the first specific data storage format;

S102. For the elevation value, you can input the elevation that is determined and needs to be used as the reference elevation, modify the value of the elevation text to the actual determined elevation value, and set the elevation text and/or the elevation line corresponding to the elevation text to a second specific data storage format;

S103. Obtain the Y coordinates of all elevation lines whose format is the first specific data storage format or the second specific data storage format, and sort the Y coordinates of all elevation lines from small to large/large to small , and at the same time obtain the Y coordinates of all elevation texts whose format is the first specific data storage format or the second specific data storage format, and proceed from small to large/large to large according to the Y coordinates of the elevation text Small sorting, and then pair the Y coordinates of the sorted elevation lines with the sorted elevation text into an array, and finally traverse the array, and set the Y coordinates of the elevation lines or the source of the elevation text as the second specific The array item in the data storage format is marked as the base level;

S104. Set the number of valid digits after the decimal point of the elevation value, and set the proportional coefficient;

S105. Calculate the elevation value of each non-reference elevation according to the reference elevation and the proportional coefficient, and then perform an effective value calculation on the calculated elevation value according to the number of significant digits that need to be retained after the decimal point of the elevation value, and finally calculate each effective value The elevation value of the value is updated to the corresponding elevation text.

Optimally, in the step S101, the first specific data storage format is a layer with a first specific color and a specific name. Further optimized, in the step S102, the second specific data storage format is a second specific color, wherein the second specific color is two different colors from the first specific color.

Optimally, in the step S103, if the Y coordinate of the starting point of a certain elevation line is different from the Y coordinate of the ending point, a prompt is given and the method exits.

Optimally, in the step S104, the number of significant digits that need to be retained after the decimal point of the elevation value is set as follows:

The number of valid digits after the decimal point for reading the reference elevation;

Or, when there are two or more datum elevations and the elevation values of each datum elevation have different numbers of significant digits after the decimal point, read the text of the elevation text corresponding to the maximum/minimum Y coordinate of the elevation line in all datum elevations number of decimal places.

Optimally, in the step S104, the proportional coefficient is set as follows:

When there are two reference elevations, the proportional coefficient can be directly calculated according to the following formula: proportional coefficient = the difference between the elevation values of the two reference elevations/the Y coordinate difference of the elevation lines of the two reference elevations;

Or, when there is only one datum level and the scale factor cannot be obtained directly, first read the scale factor DIMLFAC marked in advance, and then calculate the scale factor according to the following formula: scale factor = DIMLFAC* dimension unit/elevation unit.

Optimally, in said step S104, when there are three or more reference elevations, first calculate the proportional coefficient between each pair of adjacent two reference elevations according to the following formula: proportional coefficient=the difference between the elevation values of the two reference elevations / The Y coordinate difference of the elevation lines of the two reference elevations, and then compare whether all the calculated proportional coefficients are consistent, and if they are inconsistent, give a prompt and exit.

Optimally, in the step S105, the following steps are included:

S501. Select a reference level arbitrarily in the array, and obtain the Y coordinate of the elevation line in the reference level and the elevation value in the corresponding elevation text;

S502. Traversing through each array item in the array, and judging whether it has been marked as a reference elevation, if yes, then select the next array item, and continue to judge whether it has been marked as a reference elevation, if not, then perform subsequent steps S503-S504 ;

S503. Calculate the elevation value of the elevation text in the currently selected array item as follows: the Y coordinate of the elevation line in the array item is subtracted from the Y coordinate of the elevation line in the selected datum elevation, and then multiplied by the value in step S104 The set scale factor is finally added to the elevation value corresponding to the elevation text in the selected datum elevation;

S504. According to the number of valid digits that need to be retained after the decimal point of the elevation value set in the step S104, the calculated elevation value is effectively taken, and then the elevation value of the elevation text in the corresponding array item is modified to be effective data after the value.

The beneficial effects of the present invention are:

(1) The invention provides a new method for automatic batch processing of elevations in AutoCAD engineering drawings, that is, when creating elevations in elevations, elevation lines, elevation symbols and elevation texts can still be drawn according to the usual drawing habits , and only require the elevation line and elevation text to meet a specific format, without any restrictions on fonts and elevation symbols, and do not depend on any pre-created attribute blocks, so that not only can automatically process elevations in AutoCAD engineering drawings in batches, reducing Human workload, avoiding manual errors, avoiding problems such as copying garbled characters, greatly improving the efficiency and accuracy of drawing elevations, and facilitating practical promotion and application.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a flow chart of the method for processing elevation in AutoCAD engineering drawings provided by the present invention.

Fig. 2 is an example diagram of the first type of elevation including elevation lines, elevation symbols and elevation text provided by the present invention.

Fig. 3 is an example diagram of the second type of elevation including elevation lines, elevation symbols and elevation text provided by the present invention.

Fig. 4 is the stair elevation after creating a level in the AutoCAD engineering drawing provided by the present invention.

Fig. 5 is an elevation view of the staircase provided by the present invention after several elevations are placed at each elevation position.

Fig. 6 is an elevation view of stairs with the selected elevation values 15.700M and 22.500M as reference elevations provided by the present invention.

Fig. 7 is an elevation view of stairs after calculation and updating of elevation values for all non-reference elevations provided by the present invention.

Detailed ways

The present invention will be further elaborated below in conjunction with the accompanying drawings and specific embodiments. It should be noted here that the descriptions of these embodiments are used to help understand the present invention, but are not intended to limit the present invention. Specific structural and functional details disclosed herein are for purposes of describing example embodiments of the invention only. However, the invention may be embodied in many alternative forms and should not be construed as limited to the embodiments set forth herein.

It will be understood that, although the terms first, second etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one unit from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of example embodiments of the present invention.

It should be understood that the term "and/or" in this article is only an association relationship describing associated objects, indicating that there may be three relationships, for example, A and/or B may mean: A exists alone, B exists alone, and at the same time There are three situations of A and B. The term "/and" in this article describes another associated object relationship, which means that there can be two relationships, for example, A/ and B, which can mean: A exists alone, and A and B exist alone In both cases, in addition, the character "/" in this article generally indicates that the contextual objects are an "or" relationship.

It will be understood that when an element is referred to as being "connected," "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may be present. In contrast, when an element is referred to as being "directly connected" or "directly coupled" to another element, there are no intervening elements present. Other words used to describe the relationship between elements should be interpreted in a similar fashion (e.g., "between" versus "directly between," "adjacent" versus "directly adjacent," etc.) .

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments of the invention. As used herein, the singular forms "a", "an" and "the" are intended to include plural forms unless the context clearly dictates otherwise. It should also be understood that the terms "comprises", "comprises", "comprises" and/or "comprises" when used herein designate the existence of stated features, integers, steps, operations, elements and/or components, And it does not exclude the existence or addition of one or more other features, numbers, steps, operations, units, components and/or their combinations.

It should also be noted that in some alternative implementations, the functions/acts may occur out of the order noted in the figures. For example, two figures shown in succession may, in fact, be executed substantially concurrently or may sometimes be executed in the reverse order, depending upon the functions/acts involved.

In the following description specific details are provided to facilitate a thorough understanding of example embodiments. However, it would be understood by those of ordinary skill in the art that example embodiments may be practiced without these specific details. For example, systems may be shown in block diagrams in order not to obscure the examples in unnecessary detail. In other instances, well-known procedures, structures and techniques may not be shown in unnecessary detail in order not to obscure the example embodiments.

Embodiment one

The purpose of this embodiment is to mark the elevation of each floor of the stairs in the elevation of a stairwell. The elevation of the stairwell is drawn in the X-Y plane of the AutoCAD model space, and the height direction along the stairs is the Y direction. It is known that the elevations of the frame beams on the first, second and third floors are 15.7M and 22.5M respectively and 28.5M. The drawing scale of the elevation is 1:100, that is, the 1mm in the drawing is the actual 100mm, and the elevation takes 3 valid figures.

As shown in FIGS. 1 to 7 , the method for processing elevations in AutoCAD engineering drawings provided in this embodiment includes the following steps S101 to S105 .

S101. Create several elevations in the AutoCAD engineering drawing, and set the elevation line and elevation text of each elevation to the first specific data storage format AA.

As shown in Figures 2 to 3, all elevations are composed of elevation lines, elevation symbols and elevation text, and in any elevation, there must be one and only one elevation line and one and only one elevation text, and the rest belong to elevation symbols , and the elevation line must be a horizontal line, that is, the Y coordinates of the starting point and the ending point must be the same.

In step S101 of this embodiment, the first specific data storage format AA is a layer with a first specific color and a specific name, that is, the elevation line and elevation text are placed on the specific layer, and at the same time, for the convenience of manual Identify, and set the color of the layer to a specific color (ie the first specific color): you can use AutoCAD's layer isolation command Layiso to check whether there is and only the elevation line and elevation text are located on the specific layer, Otherwise modify it. In this embodiment, specifically, in AutoCAD, the first specific data storage format AA can be specifically set in the following manner: a layer with a specific name named "Powerful Elevation", and the first specific color of this layer is a representative symbol of 21 number color. When creating elevations, you must and only place elevation lines and elevation text on the "strong elevation" layer, and elevation symbols should be placed on other layers.

As shown in Figure 4, after creating the first level in the staircase elevation, place the level line and level text on the "strong level" layer, and the content of the level text (that is, the level value) can take a value at will, The specific elevation value will be automatically calculated and filled in the subsequent steps. Then, as shown in Figure 5, copy the elevation to other places that require elevation.

In addition, if dealing with the elevation in the existing drawing, it is necessary and only necessary to modify the elevation line and elevation text to the "strong elevation" layer. Further optimization, in order to achieve quick modification, a supporting plug-in can be created to automatically create a "strong elevation" layer with a specific color of No. 21 in the current drawing, and modify the selected elevation line and elevation text to "strong Elevation" layer.

S102. For the elevation value, you can input the elevation that is determined and needs to be used as the reference elevation, modify the value of the elevation text to the actual determined elevation value, and set the elevation text and/or the elevation line corresponding to the elevation text to A second specific data storage format.

The non-reference elevation in this embodiment refers to the elevation whose elevation value needs to be calculated by using the present invention, and the reference elevation is the elevation whose index height value has been determined, and the number of reference elevations is obviously not less than one. In order to facilitate manual inspection of drawings through eyesight, and also to facilitate manual operation, the second specific data storage format described in this embodiment is: for the elevation text and/or that have been set as the first specific data storage format in S101 Change the color of the elevation line to the second specific color, that is, the difference between the second specific data storage format and the first specific data storage format is only the color. In actual operation, the color of the elevation text and/or elevation line that has been set as the first specific format is modified to the second specific color (only the color is modified). The modified second specific color can be exemplified as: 5 number blue.

In this embodiment, the elevations of the three floors are known to be 15.7M, 22.5M, and 28.5M respectively, and the elevations of the rest of the stairs need to be calculated, so you can choose only one, choose two or all three known elevation as the base elevation. When setting as the reference level, you can change the corresponding level line to No. 5 blue, or set the corresponding level text to No. 5 blue, or set both the level line and the corresponding level text to No. 5 blue. In this embodiment, for example, the corresponding elevations of the first floor 15.7M and the second floor 22.5M are selected as the reference elevation, and the specific operation is to modify the color of the elevation lines corresponding to 15.7M and 22.5M to No. 5 blue ( As shown in Figure 6). Since this embodiment requires 3 significant figures after the decimal point, the elevation characters of the first floor and second floor elevations are respectively modified to 15.700 and 22.500, so that in the subsequent step S104, the elevations of these two reference elevations can be read The number of significant digits after the decimal point of the value, as the number of significant digits after the decimal point for all calculated elevation values.

In this embodiment, because the first specific data storage format AA refers to the layer whose color is No. 21 and the name is "Strong Elevation", the second specific data storage format BB refers to the layer that has been set as the first specific The elevation text or elevation line in the data storage format AA is changed to No. 5 blue, so you can use AutoCAD’s built-in commands LAYISO layer isolation, LAYON layer on, LAYOFF layer off, and manually check whether there is and only the elevation line and The level text is on the "strong level" layer, and check whether the color of the layer, the color of the level line of the base level, and the color of the level text of the base level meet the requirements.

S103. Obtain the Y coordinates of all the elevation lines whose format is the first specific data storage format AA or the second specific data storage format BB, and perform the Y coordinates of all elevation lines from small to large/large to small At the same time, obtain the Y coordinates of all the elevation texts whose format is the first specific data storage format AA or the second specific data storage format BB, and perform all elevation texts from small to large according to the Y coordinates of the elevation texts /Sort from large to small, then pair the Y coordinates of the sorted elevation lines and the sorted elevation texts into an array NN one by one, and finally traverse the array NN, and put the Y coordinates of the elevation lines or the source of the elevation text The array entry for said second specific data storage format BB is labeled Base Level.

In this embodiment, as shown in FIG. 6 , there are thirteen elevations in total, and two of them are taken as reference elevations (that is, the elevations corresponding to 15.7M and 22.5M). After selecting the range that needs to be processed in AutoCAD, find all the line segments (that is, elevation lines) and characters (that is, elevation text) that are located on the "strong elevation" layer and whose color is Bylayer or No. 5 blue, and then find out The Y coordinate of each line segment, and sort the Y coordinates. For optimization, if the starting Y coordinate of a certain elevation line is different from the ending Y coordinate, it will prompt and exit. Find the Y coordinate of each character at the same time, and then sort the characters according to the Y coordinate of the character (the sorting method is the same as the Y coordinate sorting method of the line segment, the same is the order from small to large or from large to small), and then The Y coordinates of the sorted line segments and the sorted characters are matched one by one to form the array NN.

Because the second specific data storage format BB in this embodiment refers to the layer located at the "strong elevation" and the color is No. 5 blue, so the array NN is traversed, and the Y coordinate or character source of the line segment is the The array items of the second specific data storage format BB are labeled as base level. When the number of the reference elevation is zero, that is, there is no array item marked as the reference elevation in the array NN, a prompt should be prompted to manually set the reference elevation.

S104. Set the number of valid digits after the decimal point of the elevation value, and set the proportional coefficient.

In said step S104, the specific way of setting the number of significant digits after the decimal point of the elevation value can be through keyboard input, or it can be to read the number of significant digits after the decimal point of the reference elevation, and the present embodiment selects the reading standard The number of valid digits after the decimal point for the elevation value of the elevation. And when there are two or more datum elevations and the number of significant digits after the decimal point is different for the elevation values of each datum elevation, you can prompt this error message and exit, or you can manually select one of the datum elevations and obtain its decimal places It can also read the decimal places of the elevation text corresponding to the maximum/minimum Y coordinate of the elevation line in all datum elevations. In order to use it quickly and reduce the trouble of man-machine input, in this embodiment, when there are more than two reference elevations, the default is to directly read the decimal places of the elevation text corresponding to the minimum Y coordinate of the elevation line in all reference elevations .

When drawing engineering drawings in AutoCAD, the scale factor = the difference between the elevation values of the two reference elevations/the Y coordinate difference of the elevation lines of the two reference elevations. Therefore the proportional coefficient can be set according to one of the following modes: (1) when there are two benchmark elevations, the proportional coefficient can be directly calculated according to the following formula: proportional coefficient=the difference value/two benchmarks of the altitude values of the two benchmark elevations The Y coordinate difference of the elevation line of the elevation; (2) when there is only one datum elevation and can not directly obtain the scale factor, first read the scale factor DIMLFAC (commonly used term or setting parameter in the existing AutoCAD) of dimensioning in advance, Then calculate the scale factor according to the following formula: scale factor = DIMLFAC * dimension unit / elevation unit. For the second type, for example, when the unit of the dimension is mm and the unit of the elevation is m, the scale factor=DIMLFAC/1000; and when the unit of the dimension is the same as the unit of the elevation, the scale factor=DIMLFAC. In addition to optimization, when there are three or more reference elevations, first calculate the proportional coefficient between each pair of adjacent two reference elevations according to the following formula: proportional coefficient = the difference between the elevation values of the two reference elevations / the elevation of the two reference elevations The Y coordinate difference of the line, and then compare whether all the calculated proportional coefficients are consistent, and if they are inconsistent, give a prompt and exit.

In order to use it quickly and reduce the trouble of man-machine input, in this embodiment, when there is only one reference level, the engineer can mark at least one dimension in the drawing and select the dimension together when selecting the level that needs to be processed In order to automatically obtain the proportional coefficient. In addition, in order to reduce the workload of manual input and the probability of errors, engineers should try to avoid setting 3 or more benchmark elevations.

S105. Calculate the elevation value of each non-reference elevation according to the reference elevation and the proportional coefficient, and then perform an effective value calculation on the calculated elevation value according to the number of significant digits that need to be retained after the decimal point of the elevation value, and finally calculate each effective value The elevation value of the value is updated to the corresponding elevation text.

In the step S105, optimization includes the following steps: S501. Select a reference level arbitrarily in the array, and obtain the Y coordinate of the level line in the reference level and the level value in the corresponding level text; S502. Traversing through each array item in the array, and judging whether it has been marked as a reference elevation, if yes, then select the next array item, and continue to judge whether it has been marked as a reference elevation, if not, then perform subsequent steps S503-S504; S503 . Calculate the elevation value of the elevation text in the currently selected array item as follows: the Y coordinate of the elevation line in the array item is subtracted from the Y coordinate of the elevation line in the selected datum elevation, and then multiplied by the value obtained in step S104. The set proportional coefficient is finally added to the elevation value corresponding to the elevation text in the selected datum elevation; S504. According to the elevation value set in the step S104, the number of significant digits to be retained after the decimal point is calculated for the elevation The value is valid, and then the elevation value of the elevation text in the corresponding array item is modified to the data after the effective value is obtained.

In this embodiment, since there are two reference elevations corresponding to 15.700 and 22.500 respectively, it is only necessary to arbitrarily select one reference elevation for calculating the elevation value of the elevation character. In addition, considering that the value of the reference elevation is determined in advance and may not need to be calculated, the judgment condition described in step S502 can be set to skip the array items marked as the reference elevation. Finally, by running the aforementioned step S105, all elevations as shown in FIG. 7 can be finally calculated to achieve the purpose of the present invention.

In summary, adopting the method for processing elevations in AutoCAD engineering drawings provided by this embodiment has the following technical effects:

(1) This embodiment provides a new method for automatic batch processing of elevations in AutoCAD engineering drawings, that is, when creating elevations in elevations, elevation lines, elevation symbols, and elevation texts can still be drawn according to the usual drawing habits , and only require the elevation line and elevation text to meet a specific format, without any restrictions on fonts and elevation symbols, and do not depend on any pre-created attribute blocks, so that not only can automatically process elevations in AutoCAD engineering drawings in batches, reducing Human workload, avoiding manual errors, avoiding problems such as copying garbled characters, greatly improving the efficiency and accuracy of drawing elevations, and facilitating practical promotion and application.

The multiple embodiments described above are only illustrative, and the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may Located in one place, or can be distributed to multiple network elements. Part or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. It can be understood and implemented by those skilled in the art without any creative effort.

Through the above description of the implementations, those skilled in the art can clearly understand that each implementation can be implemented by means of software plus a necessary general-purpose hardware platform, and of course also by hardware. Based on this understanding, the essence of the above technical solution or the part that contributes to the prior art can be embodied in the form of software products, and the computer software products can be stored in computer-readable storage media, such as ROM/RAM, magnetic discs, optical discs, etc., including several instructions to make a computer device execute the methods described in various embodiments or some parts of the embodiments.

The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be described in the foregoing embodiments Modifications to the technical solutions recorded, or equivalent replacements for some of the technical features. However, these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Finally, it should be noted that the present invention is not limited to the above optional embodiments, and anyone can obtain other various forms of products under the enlightenment of the present invention. The above specific implementation methods should not be construed as limiting the protection scope of the present invention. The protection scope of the present invention should be defined in the claims, and the description can be used to interpret the claims.

Claims (7)

1. A method for processing elevation in AutoCAD engineering drawing, is characterized in that, comprises the steps: S101. Create several levels in the AutoCAD engineering drawing, and set the level line and level text of each level as the first specific data storage format; S102. For the elevation value, you can input the elevation that is determined and needs to be used as the reference elevation, modify the value of the elevation text to the actual determined elevation value, and set the elevation text and/or the elevation line corresponding to the elevation text to a second specific data storage format; S103. Obtain the Y coordinates of all elevation lines whose format is the first specific data storage format or the second specific data storage format, and sort the Y coordinates of all elevation lines from small to large/large to small , and at the same time obtain the Y coordinates of all elevation texts whose format is the first specific data storage format or the second specific data storage format, and proceed from small to large/large to large according to the Y coordinates of the elevation text Small sorting, and then pair the Y coordinates of the sorted elevation lines with the sorted elevation text into an array, and finally traverse the array, and set the Y coordinates of the elevation lines or the source of the elevation text as the second specific The array item in the data storage format is marked as the base level, and when there is no array item marked as the base level in the array, it prompts to manually set the base level, wherein the sorting method of the level text is consistent with the Y coordinate sorting mode of the level line, The same order from small to large or from large to small; S104. The number of significant figures needs to be reserved after the decimal point of the setting elevation value, and the proportional coefficient is set, wherein, the proportional coefficient is set in the following manner: when there are two benchmark elevations, the proportional coefficient is directly calculated according to the following formula: proportional coefficient=two benchmarks The difference of the elevation value of the elevation/the Y coordinate difference of the elevation line of the two reference elevations; or, when there is only one reference elevation and the proportional coefficient cannot be obtained directly, first read the pre-marked scale factor DIMLFAC, and then proceed as follows The proportional coefficient is calculated by the formula: proportional coefficient = DIMLFAC * dimension unit/elevation unit; S105. Calculate the elevation value of each non-reference elevation according to the reference elevation and the proportional coefficient, and then perform an effective value calculation on the calculated elevation value according to the number of significant digits that need to be retained after the decimal point of the elevation value, and finally calculate each effective value The elevation value of the value is updated to the corresponding elevation text. 2. A method for processing elevations in AutoCAD engineering drawings as claimed in claim 1, characterized in that: in said step S101, said first specific data storage format is a file with a first specific color and a specific name layers. 3. A method for processing elevations in AutoCAD engineering drawings as claimed in claim 2, characterized in that: in said step S102, said second specific data storage format is a second specific color, wherein said The second specific color is two different colors from the first specific color. 4. A method for processing elevation in AutoCAD engineering drawings as claimed in claim 1, characterized in that: in said step S103, if the Y coordinate of the starting point of a certain elevation line is different from the Y coordinate of the end point, a prompt is given and exit. 5. a kind of method for processing elevation in AutoCAD engineering drawing as claimed in claim 1, is characterized in that, in described step S104, needs to keep the number of significant digits after the elevation value decimal point is set as follows: The number of valid digits after the decimal point for reading the reference elevation; Or, when there are two or more datum elevations and the elevation values of each datum elevation have different numbers of significant digits after the decimal point, read the text of the elevation text corresponding to the maximum/minimum Y coordinate of the elevation line in all datum elevations number of decimal places. 6. A kind of method for processing elevation in AutoCAD engineering drawings as claimed in claim 1, is characterized in that, in described step S104, when there are three and above reference elevations, first calculate each relative relative elevation according to the following formula Proportional coefficient between two adjacent benchmark elevations: proportional coefficient = difference between the elevation values of the two benchmark elevations/Y coordinate difference of the elevation lines of the two benchmark elevations, then compare whether all the calculated proportional coefficients are consistent, and prompt if they are inconsistent and exit. 7. A kind of method for processing elevation in AutoCAD engineering drawing as claimed in claim 1, is characterized in that, in described step S105, comprises the following steps: S501. Select a reference level arbitrarily in the array, and obtain the Y coordinate of the elevation line in the reference level and the elevation value in the corresponding elevation text; S502. Traversing through each array item in the array, and judging whether it has been marked as a reference elevation, if yes, then select the next array item, and continue to judge whether it has been marked as a reference elevation, if not, then perform subsequent steps S503-S504 ; S503. Calculate the elevation value of the elevation text in the currently selected array item as follows: the Y coordinate of the elevation line in the array item is subtracted from the Y coordinate of the elevation line in the selected datum elevation, and then multiplied by the value in step S104 The set scale factor is finally added to the elevation value corresponding to the elevation text in the selected datum elevation; S504. According to the number of valid digits that need to be retained after the decimal point of the elevation value set in the step S104, the calculated elevation value is effectively taken, and then the elevation value of the elevation text in the corresponding array item is modified to be effective data after the value.

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