Re: [OSM-Talk-ZA] Question: Assessing Quality of Map Coverage in SA?

2013-04-29 Thread Craig Leat
The devil is in the detail. I would say you can have a high quality map, but with limited coverage. Think of the site plan of your house. To assess quality or coverage I don't think you can compare OSM to other map providers, as which provider represents the gold standard? I would change the

Re: [OSM-Talk-ZA] Updated CD:NGI Aerial Imagery Now Available

2013-01-10 Thread Craig Leat
You are using EPSG:4326 projection instead of EPSG:3857 Use this file in QGIS as the raster layer: http://aerial.openstreetmap.org.za/aerial-osm-org-za-tiles.xml (save it locally first) Thanks Grant, Your xml file works well. Qgis is just much slower than my browser to load the data :(

Re: [OSM-Talk-ZA] Quick Preview of CD:NGI aerial imagery

2012-08-16 Thread Craig Leat
Nice work Grant! I found gaps too and most resulted from incorrect georeferencing embedded in the sid or tif file. The world files were correct, but gdal ignores them and gives precedence to the embedded georeferencing. I had to create gdal vrt files and fill them with the information from the

Re: [OSM-Talk-ZA] National Parks (Drakensberg)

2011-02-23 Thread Craig Leat
Failing the data being available, would it be safe to assume the reserve lies between Lesotho and the surrounding municipal boundaries? District and local municipality boundaries are already shown on the map. The difference between the two represent DMAs (district management areas) which

Re: [OSM-talk] uStream .tv broadcast 2pm PST 5pm EST - geobase import

2009-01-26 Thread Craig Leat
Hi Sam wrote: Correction: for step 8, the correct word is MERGE (not purge). snip /snip -unfortunatly, the only program that can do this is ArchGIS (i think) -is there any opensource equivelant that can do this? uDig has a light weight conflation tool: