TSPS MAR 2025 FINAL REV - Flipbook - Page 18
TECHNOLOGY
Another very important thing is Geo-tagging photos of all the
small details, example; ICV, clean-out, or other importn details
we want to remember during the extraction process.
Note: As you can see in the images, there are areas of the structure’s roof
that are not covered, as we focused more on the lower levels, knowing we
have that data from the drones. In a case where we needed to cover the
roof, we would move my setups differently and most likely use the spider
tripod, which has a 15’ extension. It has its particularities in terms of use,
but that could be covered in another article.
16 THE TEXAS SURVEYOR March 2025
3. EXTRACTION FOR CAD
A3- Points and line work
For point and line extraction, we used a combination of two programs: Carlson Point Cloud and TopDOT within the basic version of MicroStation. Neither of these programs offers a “magic” extraction that automatically generates a 昀椀nal product; both
have helpful tools, but their effectiveness depends on the type
of work needed. In this case, we did 95% of the extraction using
Carlson Point Cloud. For road or railroad projects, TopoDOT is
more useful.
Note: Always keeping in mind the type of data I want to extract. For
example, if I need a point for a tree, it doesn’t have to be as precise, but
if it’s a building corner or manhole, in that case, the process needs to be
optimized and carefully veri昀椀ed. This project also included the property
boundary, which was captured using RTK with an OPUS solution via PPK
