[mapguide-users] Geometry vs. Geography. Projections. Distortions

[Kenneth Skovhede, GEOGRAF A/S]

MapGuide will perform data reprojection if needed, although it costs 
some speed.
If your data reports the correct projection and your map has the desired 
view projection,
all should look correct.

You can change the map's projection to whatever you think is best.

If your data reports the wrong projection, you can add a coordinate 
system override on the
FeatureSource.

For best practices (read: performance), I recommend that you keep data 
and map in the same projection
whenever possible.

Regards, Kenneth Skovhede, GEOGRAF A/S



miansi skrev:
> Hello,
>
> I have 2 shape files with geography and geometry data.
> If I will present geography data on the map it will look distorted.
> Geometry data looks OK.
> In real application we would use SQL 2008 instead of shape files to store
> spatial information.
>
> Is it possible to tell (MapGuide/Map?) to apply projection to geography
> data, so it will not going to look distorted on the map?
>
> The reason is - that it is looks like Lat/Long is the "standard"
> interopability format and we would like to store all our Geo data in
> Geography format. But when it comes to presenting data we would like to see
> it in geometry format.
>
> Is it possible it all? What are the best practices?
>
> Please see image attached.
> http://n2.nabble.com/file/n4033649/19-11-2009%2B11-42-09%2BAM.png 
>
>
> Thank you,
>
> Andrei
>