TSPS MAR 2025 FINAL REV - Flipbook - Page 19
TECHNOLOGY
B3- Surface extraction to generate contours (topography).
We used the Reigl XML, as the DJI one had more noise. We incorporated the break lines we had already extracted to use them
and improve the interpolation of the triangles.
complex process. If not properly optimized, even the most
expensive equipment will fail to deliver satisfactory results.
4. The most effective approach is to analyze each project in advance and carefully plan which equipment and technology
to use. In the example I presented, I combined drones with
LiDAR and cameras for orthophotos, terrestrial scanning,
and conventional RTK. This approach allowed me to maximize the strengths of each technology based on the project’s
speci昀椀c needs.
*The key is to plan thoroughly and then execute ef昀椀ciently
and learn from each project.
“Give me six hours to chop down a tree, and I will spend the 昀椀rst
four sharpening the axe.” — Abraham Lincoln
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After verifying and modifying the triangle interpolation, we
generated the contour lines from my 昀椀nal surface.
CONCLUSIONS:
1. LiDAR sensors produce varying results, and human judgment is always necessary to determine the correct interpolation. Some sensors simplify this process more than others,
but each individual or company must decide which one best
昀椀ts their needs.
2. Data extraction software has improved signi昀椀cantly, making
the process more ef昀椀cient. However, the choice of software
depends on the speci昀椀c type of work being performed. It’s
crucial to select a tool that meets the project’s requirements.
These programs are not fully automatic—obtaining accurate
data extraction still requires time and expertise. There is no
“magic” software or arti昀椀cial intelligence capable of fully
automating the process. I always say, “when someone invents
a technology that can replace a human with a machete and a
shovel, then 昀椀eld surveyors will no longer be needed, and we
can leave it all to the computers.” —Alexis Cardona López.
3. The integration of terrestrial and airborne LiDAR data is a
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