CAD Import for Cross Section Drawing

https://esurveying.net/cross-section-software/importing-data-from-cad CAD Import for Cross Section Drawing Welcome to a video tutorial on how to import cross-section cross-section levels from CAD drawing to ESurvey CADD. This process involves 5 easy steps 0:00 -Introduction to CAD Import for Cross Section Drawing 0:33 -Mark Chainages along the Alignment 1:47 - Create offset lines and move entities to specific layers 2:44 - Interpolate the values 4:02 - Export values from CAD drawing 4:38 - Import values in ESurvey CADD #crosssection, #highwaydesign, #landsurvey, #infrastructure, #autocad, #bricscad, #totalstation Mark Chain ages along the alignment (MCH) In road, railway and canal projects cross sections are created at fixed distances, say 30M and the area computation is done in these cross sections and then the volume is computed depending on the area. Normally survey is also done at those fixed distances only. However, it is not possible to Exactly survey on the points at those distances and their respective offsets. Using the ESurvey CADD Interpolation module interpolating the values is easy. Type ‘MCH’ (Mark Chainages) at the command prompts. A window will appear expecting inputs like Prefix, Suffix, Starting Chainage, Increment Etc. Please specify Cross Section Interval in Increment and Cross section line length as per the project requirement. Click on Ok, and then select the alignment. You may not that program will create cross section lines (that is Chainages) along the alignment. Depending on the input values Label indicating the Cross Section value is also marked. Create offset lines and move entities to specific layers For interpolating multiple values, ESurvey CADD expects layerisation of Text and lines. All the cross section lines need to be in the ‘CS’ layer. The central line that is the alignment line needs to be in LS layer. You can offset the center line on either side depending on the offsets at which you want to interpolate the values. In this example, you can note that the centerline is offset at distances 2, 4, 7 and 10 on either side. These offset lines are to be present in the “Offset” Layer. Elevation texts representing the surface should be in ‘Elev’ layer. Once the text and lines are in ‘LS’, ‘Elev’, ‘Offset’ and ‘Elev’ layers, you are ready to interpolate values in bulk. C) Interpolate the Values Interpolation along the alignment can be done with ‘ITI’ or ‘IDI’ command. To interpolate the values with the ITI command elevation needs to be in the Elev layer and ESurvey CADD will interpolate the values at all the intersections of the CS line with an offset and LS layer. Only the levels to be considered for interpolation should be in the Elev layer. In the case of IDI Command, LS and offset lines need to be 3D lines and IDI command will interpolate at the intersection point of all the LS and offset lines. You may note that all the interpolated values will get created in a layer named ‘Layer1’. In the case of the ITI command if the intersection point is outside the surface created using the levels in Elev layers, the software will create the levels in the layer named ‘Layer2’ which will help you to make out that the levels interpolated are outside the imaginary boundary defined by elevation points. Once you verify those values if you decide to use those values, move it to layer ‘Layer1’. d) Export values from CAD Drawing Interpolated values need to be exported to ESurvey CADD using the CSA command. When you give CSA command, CAD will ask you a factor called box width specify 0.5 and select the cross section lines for which you want to export the values. If you want to export all the data, type ‘all’ at the command prompt. ‘CSA’ command will scan the drawing and export the interpolated values to a temporary location. e) Import values in ESurvey CADD Data exported from CAD will be in a temporary location. Open ESurvey CADD, Create a New file and Click on the CAD Import button from the Tool bar and click on the Import button to Import the levels from CAD. You may note that all the cross section levels are imported from CAD and respective Cross sections are being displayed in ESurvey CADD. ----------Related Subjects------------ CAD Import for Cross Section Drawing How to Import CS Data from a Drawing How to draw road cross section using autocad data Draw a X section by using Autocad data CS and LS From AutoCAD L Section and Cross Section using CAD Data Interpolating Cross Section Data Export CS Data from CAD File Cross Section from Survey Data Reduced Level Export from CAD Export Alignment Data as CS Cross Section using Ground Level LS CS from Elevations Export values from CAD drawing Land Survey BricsCAD ZWCAD Thank you for watching this video. Please visit www.esurveying.net to learn the software in detail. https://esurveying.net/cross-section-software/esurveycadd-ls-cs Subscribe to our YouTube Channel: https://www.youtube.com/c/EsurveyingNet