Road design module of ESurvey CADD has 5 Tabs. The first tab is “Existing Surface” Tab. This tab allows you to import point data – i.e, Surface data. We can also do an analysis of imported point and eliminate errors if any. A feature provided in tab allows you to filter the data based on coordinates and elevations. We can also see triangulation i.e, TIN to understand the base surface. You can also see the surface model in 3D.
Follow these steps one by one to understand surface tab functionality.
1. Importing points from CAD Package
• Open drawing containing levels in the cad package
• Go to E Survey CADD menu, select “Road design-Export ground (EXEL)” and export ground level.
• After executing command ESurvey CADD shows the number of elevations exported.
After executing command in Command Prompt it will shows the number of elevations exported.
• Now switch to ESurvey CADD interface and in “Existing surface tab – select import-cad – Import ground data” to see the imported levels.
2. Import break lines and boundary from CAD
As we have exported ground level from CAD Package, in similar lines we can export boundary and brake lines from CAD Package and import the same in E Survey CADD.
3. Importing Ground Levels from Excel
You have seen how to import ground levels from drawing files. In case if you have ground data in Excel or CSV format, you can import the same by selecting excel option in importing surface data.
Note that you have to indicate the column numbers with respect to the data being imported.
4. Surface analysis using layers
Once data are imported you can optionally see points, boundary, brake lines, Tin Etc. by switching on required layers.
In case if you want software to compute the boundary depending on the surface points, you have to specify a proper scanning radius value.
After making necessary selections in layer window you can click on the “refresh” button to see updated drawing file indicating surface data for road design.
5. Filter options
After importing ground data surface gets created depending on all imported points.
ESurvey CADD allows you to filter out some data which is not required for creating a surface. For example, in a project you wish to work with limited data, where “Easting” is restricted to some value.
Similarly, depending on “Northing”, “Remark” and “Elevation” you can filter data, and remove points which are not required for surface creation.
If you view the TIN now, you can make out that TIN has formed depending only on selected point and not considering all the imported surface points.
6. Viewing in 3D
Select the 3D check box to see the model changing into 3D mode.
You can use the mouse pointer to rotate the 3D model for visualization.
To view the plan again Deselect the 3D check box and press “refresh” icon.
7. Exporting to cad package
Press the cad package Icon to export and edit the drawing in cad package.