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OpenOrienteering / mapper

OpenOrienteering Mapper is a software for creating maps for the orienteering sport.
https://www.openorienteering.org/apps/mapper/
GNU General Public License v3.0
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Problem loading British OS grid georeferenced background maps #1110

Open Robertdove opened 6 years ago

Robertdove commented 6 years ago

Steps to reproduce

1.Set up British OS georeferenced map. Obtain image file georeferenced to the British OS grid

  1. Load as georeferenced template with no changes to default coordinates and coordinate reference system set to "local"
  2. Do I need to edit "local" settings for OS grid and if so how?

Actual behaviour

Image loads to scale but displaced when loaded into OOM. The images load correctly into OCAD with the same georeferencing and are correctly positioned when the preloaded .ocd file is opened in OOM though it does not show as georeferenced in the template setup window.

Expected behaviour

Image should load in position.

Configuration

Mapper Version: 0.8.1 Operating System: Windows 10

mpickering commented 6 years ago

You should probably use the EPSG code 27700. Are they geotiffs?

Robertdove commented 6 years ago

Thanks. Yes geotiffs and geojpgs As you have probably guessed I am old at orienteering map but new to the geospatial world and still finding my way around

mpickering commented 6 years ago

When you open the geotiff, when you select the coordinate reference system choose "by EPSG code" and then use code 27700 which is the code for the british national grid.

Robertdove commented 6 years ago

Yes thanks that works fine.
A bit confused by the number of other EPSG codes for the BNG!!!

Could be helpful if the help page gave a bit more guidance on this for us uninitiated. (Hope this gets to the right people to action)