How to import CAD files into the map new earth and accurately stack them with the image terrain tilt model

Preface ：

hold CAD File import GIS In the three-dimensional map and set to the correct coordinates , I used to ask my friends for help , But you can't bother your friends all the time , So I realized it myself , It can be so simple , At the same time, it is also found that non projection information and engineering coordinates can also be accurate to 3D maps , It is true and easy to use ！

 

01 Unknown projection information and engineering coordinate system , How to import CAD file

Usually , load CAD You need to provide accurate engineering coordinate parameters , But sometimes designers will throw an unknown projection and engineering coordinate system CAD, What to do at this time ？

Involving data ：CAD Drawing 、 High definition image 、 Topographic map

Tool software ： Figure New Earth desktop

terms of settlement ： For more technical dry goods, please follow wechat official account ：tuxingis

In the new earth ,CAD There are three forms of import ： Common mode 、 Fast mode 、 Accurate model .

Each corresponds to a different import method , To solve unknown projection information and engineering coordinate system , Need to use   Fast mode

Here we mention the common mode , That is, load directly CAD（dxf、dwg） To the new earth , This mode supports CAD Limited volume （10M following , The larger the volume, the more stuck ）, This mode does not support CAD Attached to a tilted model , No Support CAD Strict style parsing , Strict projection conversion is not supported , But in this mode ,CAD Documents can be edited into Compilation , Normal mode import CAD Just configure this CAD The coordinate system of （ Ellipsoid and projection zoning ） Can be real present CAD Loading , But loaded CAD The location may not be accurate

 

 

As you can see from the picture above ,CAD After loading in normal mode , There is a deviation from the image .

We won't introduce too much here , Focus on the latter two modes .

Fast mode , use CAD Select at least 2 Import more than association points , The import position is relatively accurate , Click to view the operation tutorial ;

Figure select the position with obvious mark in the new earth to obtain the longitude and latitude coordinates , And then in CAD Select the same location in , get XY coordinate

 

 

Obtain at least 2 More than associated points , You can accurately import CAD Into the software .

This is unknown coordinates CAD Methods of importing image map , If you don't understand , Click the tutorial below to view https://www.bilibili.com/video/BV1JJ411M7BE?p=10&vd_source=f62fbd3d946c67c748ef372e3386deda

Next, let's look at the import method of known projection and engineering coordinates ！

02 Known projection and engineering coordinate information CAD Accurate data import

Accurate model , In the form of import , take CAD（dxf、dwg） Convert parameters by projection , Convert to lcad Format , Then load it . This mode can host GB Level CAD Smooth loading of files , At the same time The mode supports strict and accurate projection conversion , Be able to carry on CAD Style text parsing , meanwhile CAD Be able to follow Attached to the inclined model , But in this mode ,CAD The file is not editable .

You can use CAD Drag the file directly to the map area of the new earth , Or use “ Start 》 Import

CAD”“ Import / export 》 Import CAD” To carry out CAD Import , Import CAD when , Select the precise mode ：

 

The default value of coordinate system setting is user-defined coordinate system . If you CAD It is the currently configured engineering coordinate system , You can directly select the engineering coordinate system , To enter the configured engineering coordinate system parameters ：

 

After setting up , Click Import , Can be CAD The file is converted to lcad file . You only need to load lcad File to achieve CAD Fast loading and viewing of files .

 

After precise import , Then the position is accurate ：

 

And after loading CAD The text of is in accordance with CAD Analyze the original style and scale ：

 

CAD Import into 3D map , Accurately match with image map , You can view the tutorial https://www.bilibili.com/video/BV1JJ411M7BE?p=11&vd_source=f62fbd3d946c67c748ef372e3386deda

03 CAD Data attachment tilt model

Imported through precise mode CAD file （lcad）, If there is an oblique photographic model in the corresponding area , be CAD The file is automatically attached to the tilted model , Realization CAD Automatic high-precision nesting of documents and inclined models .

 

 

 

04 CAD Export data

In the new earth , You can directly in the image 、 terrain 、 Orthophoto 、DSM、 Tilt model, etc Plot points, lines and surfaces on the data , And the plotting results can be directly output as CAD file .

Point, line and surface plotting reference basic help manual .

After plotting , Use Import and export 》 Export to CAD Button , Implement my landmark layer or any Meaning vector layer , The output is dxf Format file .

 

Export time , Select the vector layer to export , After setting the corresponding coordinate system , Click the Export button to get To the corresponding dxf file .

 

​