The ratio between distances on a map and distances in the world

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2
votes
2answers
1k views

MapServer computes wrong map scales — off by factor 0.77. Or is it just me?

I've noticed in a current project that MapServer seems to get the map scale wrong, or then I'm wrong, but don't see how. My mapfile contains the following definitions: RESOLUTION 72 # this is the ...
7
votes
2answers
11k views

OpenLayers: Use scales instead of resolutions

Venturing around in the OpenLayers source code, it seems like everything related to zoom-levels is done using resolutions. Fair enough since this related directly to screen space. I would like ...
3
votes
2answers
1k views

Custom scalebar units in ArcMap

Is it possible to create a scalebar in ArcMap that shows distances in custom units? I understand how to do this manually, but it would be great if I could define a custom unit of measurement (let's ...