Goal of this work in progress page is to learn how to get real world data for:
And process these through QGIS (free open source program) into terrain builder and finally into finished arma3 terrain addon.
Use plugins → manage and install plugins…
Select OpenLayer and click install, select OSMDownloader and click install.
QGIS settings → options → CRS, allows you to setup default CRS for new projects and layers. Set this to EPSG:32631, WGS 84 / UTM zone 31N
Terrains used in arma3 can only be power of two grid, like 256 x 256, 512 x 512, etc. When you get real world data from various web sources its usually downloaded in “hand drawn box” which is not perfect square (power of two), so you must clip this data into square power of two.
PMCTODO now idea how to select power of two square other than typing in lat/lon coordinate numbers
Once you have terrain loaded in QGIS, you can get streets / roads to show transparent on top of it. This is just an image, not actual road shapefiles, see Road Shapefiles Real World Data how to download roads.
Use web → openlayers plugin → openstreetmap → openstreetmap (heh yes twice).
This opens open street maps layer in your project on top of your terrain heightmap. On layers panel double click openstreetmap layer to bring up its properties. Select transparency tab and move global transparency slider to about 50% then click apply and ok.
Now you can see your terrain heightmap and openstreetmap road data together.
You can click the X button in layer panel on each layer to turn them on/off.
You should download OSM shapefiles from geofabrik.de instead.
Use web → openlayers plugin → google maps → google satellite
Hydrra: Under Open Layers plugin there will be google maps and bing maps tabs that you can use to get your sat image. On both street map and sat map there will be a button two rows under new file icon called download OSM data. Use it then select the area you want to use. let it download then when you have both your street map and sat image use the vector tool and align them. I do believe you also need to set the SRS layer as well. UTM 31.
Hydrra: to get to the vector tool hit Ctrl + alt + T and your toolbox will pop up. Just type in vector and the tool you will most likely need is the transform tool in case your sat image and street map aren't alligned.
Hydrra: Yeah, The plugin provides both sat image and street map. just make sure to separate the layer groups so it's easier to keep track of.
You should download Satellite Texture with Terra Incognita instead.
A simple guide for exporting high resolution satellite maps using QGIS by pooface
Install openweb layers for QGIS
Set your CRS (Coordinate Reference System) in QGIS of which you already know the coordinates of your map extents.
To make this possible, first find your real world location via the openweb layers plugin in QGIS, and give yourself an approximate field of view. The extents do not need to be exact, but it helps print composer.
In toolbar of QGIS find Project → new print composer (CTRL-P) This will open a new window.
On left side infobar inside composer find:
Now you may export:
In the toolbar of the print composer window, under Composer: export as image
I want my satellite image to be 0.5 meters / pixel.
My terrain is 8192 meters by 8192 meters.
Therefore, I want my page width and page height to both be 16384 pixels.
If you wish to reimport this to QGIS to guide your shapefile creation, you must include a .wld file of the same name as the image you just created.
OSM place names data sometimes comes with different order for the fields, this will break up PMC OSM Places CSV2HPP tool. You can fix this in QGIS by using “Refactor fields” plugin.
In processing toolbox search for “refactor fields”, open it. Now you can reorder the fields mapping dialog list, so if you need to swap “name” and “type” fields, just click one and use the arrow keys to move up or down.
When reorder is OK then just click run button and it creates refactored layer with the new reordered fields.