WMS map download

[Eijnden, Bart van den (AGI)]

Hi,

to download at the native resolution you can better use WCS instead of WMS.

Using WCS you can perform a DescribeCoverage operation which will give you the native resolution of your image. This can then be used in the GetCoverage request you request to Mapserver WCS.

An example snippet of a DescribeCoverage response:

  <gml:offsetVector>25 0</gml:offsetVector>
  <gml:offsetVector>0 -25</gml:offsetVector>

The first one is for the X-direction, the second for Y. So my dataset is at 25 x 25 meter per pixel resolution.

Example WCS GetCoverage request:

    $mapurl .= "request=GetCoverage&coverage=[layer_name]&crs=epsg:28992&".
               "resx=25&resy=25&format=image/tiff;

Output format used:

  OUTPUTFORMAT
    NAME "GEOTIFF"
    DRIVER "GDAL/GTiff"
    MIMETYPE "image/tiff"
    IMAGEMODE "RGBA"
    EXTENSION "tif"
    FORMATOPTION "COMPRESS=PACKBITS"
  END

Best regards,
Bart

-----Oorspronkelijk bericht-----
Van: UMN MapServer Users List
[mailto:MAPSERVER-USERS at LISTS.UMN.EDU]Namens Ryan Ollerenshaw
Verzonden: maandag 10 juli 2006 1:39
Aan: MAPSERVER-USERS at LISTS.UMN.EDU
Onderwerp: Re: [UMN_MAPSERVER-USERS] WMS map download


Quoting "Curtis W. Ruck" <ruckc at yahoo.com>:

> Try using curl with quotes around the url, by having & signs in the command
> you are actually executing multiple commands or trying to.
>

Thank you for you help Curtis.  When i try the command:

curl -O "http://neuron/cgi-bin/mapserv?map=../html/mapserver/htdocs/display.map"

a file is infact downloaded but it is not the image that i am looking for,
infact it is not an image at all, i would assume this is the case becuase i am
no longer specifying a layer name in the URL.  Is there anyway i can download a
specific layer from MapServer?


>
> Quoting Ryan Ollerenshaw <ollerery at engr.orst.edu>:
>
> > I would like to make it possible for a user to download a full resolution
> map
> > from my Linux based WMS.  Does anyone know where I can look to get started
> > implementing such a feature?
>
> It seems that i can use MapServers Web Coverage Services (WCS) to generate an
> image using the following in my mapfile:
>
> OUTPUTFORMAT
>     NAME GTiff
>     DRIVER "GDAL/GTiff"
>     MIMETYPE "image/tiff"
>     IMAGEMODE "RGB"
>     #IMAGEMODE "PC256"
>     EXTENSION "tif"
> END
>
> But i am still not getting the full resolution of the images that i am
> requesting.  Also i am still unsure how to download this image from the
> command
> line, cant i use something like curl or sftp?  When i try to use curl i get
> the
> following:
>
> -- start output --
>
> [root at neuron ~]# curl -O
>
http://neuron/cgi-bin/mapserv?map=../html/mapserver/htdocs/display.map&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&LAYERS=themis
> [1] 32392
> [2] 32393
> [3] 32394
> [4] 32395
> [2]-  Done                    SERVICE=WMS
> [3]   Done                    VERSION=1.1.1
> [root at neuron ~]#   % Total    % Received % Xferd  Average Speed   Time
> Time
>   Time  Current
>                                  Dload  Upload   Total   Spent    Left  Speed
> 100   544    0   544    0     0   7019      0 --:--:-- --:--:-- --:--:--
> 298k
>
> -- end output --
>
> Then nothing seems to happen. Any help with this would be great, thanks?
>
>
>
>
>


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