Category: Other

3D, Image Processing, OpenDroneMap, OpenDroneMap, Optics, Other, Photogrammetry

Viewing Sparse Point Clouds from OpenDroneMap — GeoKota

This is a post about OpenDroneMap, an opensource project I am a maintainer for. ODM is a toolchain for post-processing drone imagery to create 3D and mapping products. It’s currently in beta and under pretty heavy development. If you’re interested in contributing to the project head over here. The Problem So for most of the […] via Viewing Sparse Point Clouds from OpenDroneMap — GeoKota Continue reading Viewing Sparse Point Clouds from OpenDroneMap — GeoKota

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3D, Database, Docker, LiDAR, Other, PDAL, pointcloud, PostGIS, PostgreSQL

Taking Slices from LiDAR data: Part VI

I finally got PDAL properly compiled with Point Cloud Library (PCL) baked in. Word to the wise — CLANG is what the makers are using to compile. The PDAL crew were kind enough to revert the commit which broke GCC support, but why swim upstream? If you are compiling PDAL yourself, use CLANG. (Side note, the revert to support GCC was really helpful for ensuring … Continue reading Taking Slices from LiDAR data: Part VI

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3D, Database, Docker, LiDAR, Other, PDAL, pointcloud, PostGIS, PostgreSQL

Taking Slices from LiDAR data: Part V

For this post, let’s combine the work in the last 4 posts in order to get a single pipeline for doing the following: Calculate relative height of LiDAR data Slice that data into bands of heights Load the data into a PostgreSQL/PostGIS/pgPointCloud database. Now, we can use parallel to make this run a little faster: Sadly, we can run into issues in running this in … Continue reading Taking Slices from LiDAR data: Part V

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3D, LiDAR, Other, PDAL, pointcloud

Taking Slices from LiDAR data: Part IV

In PDAL, a pipeline file can be used to do a variety of operations. Within the following context, I think of a pipeline file like an ad hoc preferences file, where I can use an external command to iterate through the things I want to change, while holding constant everything else in the pipeline file. In my use case for this vignette, I’ll use the … Continue reading Taking Slices from LiDAR data: Part IV

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3D, LiDAR, Other, PDAL, pointcloud

Taking Slices from LiDAR data: Part III

forest_structure Borrowed from: http://irwantoshut.com Continuing my series on slicing LiDAR data in order to analyze a forest, one of the objectives of the current project is to understand the habitats that particular species of birds prefer. This will be accomplished using field info from breeding bird surveys combined with LiDAR data of forest structure to help predict what habitats are necessary for particular species of … Continue reading Taking Slices from LiDAR data: Part III

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3D, Other, PDAL

Taking Slices from LiDAR data: Part II

Ok, with a little help from Bradley Chambers on the PDAL mailing list, we are back in business. If we want to filter our newly calculated heights into a new PDAL output, we can do that easily, say all points 100-500 above ground level: A little sanity check to see if we are getting appropriate values: Ok, now I want to view this. I could convert … Continue reading Taking Slices from LiDAR data: Part II

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3D, LiDAR, Other, PDAL

Taking slices from LiDAR data

Welp, my BASH skills could use some honing, but I’m just working on quick-and-dirty stuff for this series. PDAL as a utility is pretty interesting, so we’ll focus our learnings on PDAL. (Prior posts start here). I may have a build tutorial written for getting through the critical (as contrasted with minimal) parts of a PDAL build. I’m getting tired of running everything through docker. … Continue reading Taking slices from LiDAR data

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