Tag Archives: QGIS

QDGC-files updated

qdgc_logoThe Quarter Degree Grid Cells (QDGC) data set has been updated. It is well over a year since last time. Some errors in the current release has made this necessary.

One of the things which kept me from doing the update was the rather complicated python-scripts combined with using the arcpy-library. The whole process was in it self complex. I dreaded sticking my head down into the python/arcpy/manual processing soup.

Through the last year or so I have started using FME more and more. Once you know a tool well you start thinking – what if… So I thought – what  if I instead of going one more round with python and arcpy tried solving this challenge using FME? Continue reading

Uganda QGIS and remote sensing workshop

qgisThis week I had the privilege of coordinating a workshop on QGIS and remote sensing in Kampala, Uganda. Our trainers were Thomas Ballatore and Shane Bradt. We were very pleased with their walkthroughs and presentations of crucial software and plugins. The training is part of the Norwegian Oil for Development Program.

The focus was of course QGIS. But to be hones BEAM Visat was a real eye-opener. Yes, I have been introduced to the software while working in an expert group on satellite imagery. We earlier this year concluded a report for the Norwegian Space Centre where BEAM Visat was mentioned as one of several crucial components for handling remote sensing data. But – the workshop provided an applied context which gave me a whole new perspective to both software and methods.

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Converting shapefiles to Mission Planner .poly-files

15-9-plannedMission Planner by Michael Oborne is an impressive piece of software. It is used to program the open-source APM autopilot. The autopilot is used to control planes, copters and rovers. I have used Mission Planner a lot and I can not do without.

Some years ago I started making a map for the Mindland island in the archipelago of Norway using a GPS, OpenStreetMap and Bing aerial imagery. The main driver for this project was to document old place names. With the drones becoming somewhat of a hobby last year I thought it would be nice to also establish a proper open license ortophoto for the island. Mission planner has what it takes to approach such a task in a structured manner, save for one thing. The polygon tool only imports .poly-files.

When working with maps some of us tend to stick with shapefiles or geodatabases. I have made a small script which allows for the conversion of a shapefile with a geographic coordinate system (wgs84) to as many .poly files as there are objects in the shapefile. Adding the functionality to Mission Planner has been indicated as possible, but has yet to materialise. So until then the script associated with this posting remains relevant. Continue reading

Mindlandskartet i versjon 2.0

mindland_2_0_illustrasjonMindlandskartet gir en god topografisk fremstilling av Mindland og en uovertruffen oversikt over stedsnavn på øya. De mange stedsnavnene ville ikke vært på kartet uten velvillig hjelp fra store og små på Mindland. Kartet er laget ved bruk av kartprogrammene ArcMap fra ESRI og QGIS. Uten kartdata fra OpenStreetMap og gratis kartdata fra Kartverket ville det blitt et stusslig kart.  Med dette er Mindlandskartet gjort fritt tilgjengelig. Kartet kan skrives ut og formidles videre av den som måtte ønske det. Gratis!

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