[OSM-legal-talk] Licensing Scenario - not theoretical

[Andrew Rowbottom]

> Why not use the grid lines? I'm sure that's what npemaps do. Obviously
> they are OSGB eastings and northings national grid, not WGS84 Lat/Lon,
> but there are tools to convert them.

Many reasons:
1. There are no grid lines on these maps they only cover 1.5 x 1 mile
2. They're not mapped to the OS National Grid
3. There's no latitude/longitude anywhere on the maps, not even around
the edges.
4. While think I know the projection and origin, I don't know exactly
where the sides of the maps are in relation to the origin, I know from
experience that the OS don't always put the coordinate origin on a map
corner.
5. None of the Map Sides appear to be aligned even to the similarly
dated Popular Edition maps. Not that they should be having a different
projection origin.
6. They're at approx 25 miles to the inch so I can't align them
against any out of copyright 1" to the mile maps.

Hope you don't take this the wrong way, I'm just explaining that I
have to use another data source for alignment. Currently its looking
like Google Aerial Images or OSM.

Andrew Rowbottom