This one is short, merely a belated link to Frederick Mbuya’s much more detailed UhuruLabs blog post on the same trip: http://uhurulabs.org/2018/02/16/opendronemap-and-uhurulabs-do-kerela/ Continue reading OpenDroneMap and Uhuru Labs in Kerala, India — another post
The State of Kerala, India has the International Centre for Free and Open Source Software (ICFOSS) an autonomous institution “mandated with the objectives of co-ordinating FOSS initiatives within Kerala, as well as linking up with FOSS initiatives in other parts of the world in order to push the agenda of promoting democratic access to information and knowledge through equitable models of production and distribution of … Continue reading OpenDroneMap and Uhuru Labs in Kerala, India
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
The Problem We have to filter out the roads and ditches without removing streams that cross roads or follow them closely. I’m going to use PostGIS to find the intersection of the streams lines data with a buffered roads polygon. If the intersected line is less than 50% of the length of the stream line, […] via Filtering Roads from Extracted Streams Data — GeoKota Continue reading Using PostGIS for Hydrologic Modeling (reblog)
Guest post from my colleague Patrick Lorch who wrote up what we did the other day in order to view a whole bunch of tiled images in a directory in QGIS (I did some mild editing to his posts. Mistakes are mine). The great thing about the approach is that is generalizeable to most tools that use GDAL for their raster API. This is part … Continue reading Efficient delivery of raster data part 4
Subdivision of geographic data is a panacea to problems you didn’t know you had. Maybe you deal with vector data, so you pre-tile your vector data to ship to the browser to render– you’re makin’ smaller data. Maybe you use cutting edge PostGIS so you apply ST_Subdivide to keep your data smaller than the database page size like Paul Ramsey describes here. Smaller’s better… . Or perhaps you … Continue reading (Whichever tiler you use) and efficient delivery of raster data (image pyramid layer) (update2)
Ok, I’m not the first to come up with that name, but I like it so it’s staying for now. The problem space is this: Your web development team is good with forms. They build forms like diurnal animals wake — daily: day in, day out, day in, day out. They want to build a form for a mobile web app and it just happens to use … Continue reading Leaflet Crosshairs
Back in 2011 I wrote a post about GDAL, translating MrSID files and trimming off the artifacts so mosaics work. I’m revisiting some similar work this week and realized I had lost my copy of FWTools that can deal with MrSIDs. The Internet Archive came to the rescue. At some point LizardTech licensed a DLL that allowed for compilation compatible with FWTools licensing so we could … Continue reading GDAL tools of the trade: GDAL, MrSid, and nearblack revisited
Dirk’s MSF Canada Drone Day is officially the first blog post I have “re-blogged”. Please read: https://smathermather.wordpress.com/2015/07/13/msf-canada-drone-day/ or better yet here: http://dirkgorissen.com/2015/07/14/msf-canada-drone-day/ I had the pleasure of co-presenting with Dirk and Ivan, and the rest is well covered in Dirk’s post. It came together as an excellent day and I think you would be hard pressed to have had a better introduction to drones. The … Continue reading MSF Canada Drone Day follow-up
Citing my previous post, let’s move on to more specifics on my thoughts regarding the integration of OpenAerialMap, OpenDroneMap, and MapKnitter as projects. OpenDroneMap ❤ OpenAerialMap. OpenAerialMap will become a platform by which drone users can share their imagery under an open license. So, as the metadata spec for OpenAerialMap and OpenImageryNetwork matures, and as soon as a publicly available place for drone users to … Continue reading OpenAerialMap, OpenImageryNetwork, MapKnitter, OpenTerrain, and OpenDroneMap (cont. 1)
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