[ka-Map-users] How to change coords from projected to lat-longs using postgis

Lorenzo Becchi lorenzo at ominiverdi.com
Thu Aug 14 06:17:46 EDT 2008


Jae, have you tried using DD units instead of meters?
see UNITS at:
http://mapserver.gis.umn.edu/docs/reference/mapfile/mapObj




CHUNRIMACHUNRIMA wrote:
> Folks,
>
> I am using Ka-explorer !
> When I draw a map, always projected coordinate system (e.g.
> x:-3815289.61 y:496358.07) is shown.
> I really want to show lat-longs coordinate system (e.g. x: -122, y:
> 42), instead.
>
> Like these websites at:
> http://clima.ominiverdi.org/ka-map/htdocs/
> http://zadeh.ugent.be/rwanda/
>
> Is there any easy way to show geographic coordinate system using
> Postgis or simply data connection?
>
> I looked up kaMouseTracker.js to figure out a possible way, but no luck.
>
> I also created new map file based on MapServer help at
> http://mapserver.gis.umn.edu/docs/reference/mapfile/projection/?searchterm=projection,
> but no success.
>
> Sure, I defined projection in the map file like below, but doesn't
> show geographic coords.
> PROJECTION
> "proj=latlong"
> "ellps=WGS84"
> "datum=WGS84"
> END
>
>
> If any of you has experienced and resolved this issue, please let me
> know.
>
> Thanks,
>
> Jae
>
>
>
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