Raster data experience

[Apeksha Bhambhani]

hiii,
  I am sending you the mapfile alongwith the raster image and the point shapefile .
  I don't have enough information about projection. I have tried finding a lot of info and read also on the Mapserver site about the same . But couldn't come to any conclusion .
  What is the projection used for . I accept user clicks(pixel values) on the image and convert into the latitude and longitude making use of the extent specified in the mapfile . Is that incorrect ?
   
  thanks a lot for your help.
  apeksha 
  

luca marletta <lucamarle at gmail.com> wrote:
  Hi Apeksha,
in order to write in world file where the map is I need to know it and
it can be done if you send me at least 2 point (better far on the tif)
with long and lat and also the coordinates system you use. better use
the WGS84 that is world wide used.

if the shp is random doesn't help at all.

ok send also the map file I'll have a look

cheers

luca

On 2/28/06, Apeksha Bhambhani wrote:
> Hii Luca,
> Thanks a lot for your help .
> We have the tiff image of the base map with us . However , what shapefile
> are you talking about . We have the shapefile of the point layer which will
> be plotted on the base map . These points are random points that we chose in
> order to test our application .
> We can also send you the mapfile.
> Thanking you ,
>
> Regards
> Apeksha
> luca marletta wrote:
>
> On 2/28/06, Apeksha Bhambhani wrote:
> > Hi luca ,
> >
> > We have developed a web-mapping application . Our mapping application uses
> > Mapserver , Php/Mapscript as the scripitng language and MySql as the
> > database.And this application accepts user clicks and allows the user to
> > edit the map : adding points, etc.
> > Now for this map , we require a base map - which is a raster layer .
> > We have tried editing the mapfile as follows:
> >
> > LAYER
> > NAME "base"
> > TYPE raster
> > DATA "india.tif"
> > END
> >
> > But this is of no help. The tiff file resides in the shapefiles directory
> > .There is no world file for this tiff file. Do we have to create one on
> our
> > own ? How is it possible to create a world file out of a plain image.
> > We want to include this raster image as our base map. Is this the right
> way
> > or is there any other way?
> >
> > Could someone please help us.
> > Thanks
> > Apeksha
>
> World file is needed at for sure with tif. You can produce it with
> some tools or also just writing it but it could be a boring and long
> job for a lot of tentatives.
>
> In both cases you need to know the coordinates system of some pints on
> the tif or better have a georeferenced vector file to match with tif
> and use to georeference it.
>
> I could do it for you if you provide both of them to me (tif and
> vector DWG or shp)
>
> I'm interested on your application also. let me know more of it
>
> cheers
>
> luca
>
>
>
>
>
> --
> luca marletta
>
>
>
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--
luca marletta


		
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