Projection on mapserver WMS versus cgi-bin

[Matthew Perry]

Sandro,

  Is the WMS image *actually* wider. If the images are
the same width but WMS appears stretched, make sure
that your image extent is proportional to the image
size. Mapserver CGI will correct for this and adjust
the extent but the WMS allows for images to be
returned with "non-square" pixels.

Matt Perry

--- Sandro Danilo Gatto <prof_gatto at YAHOO.COM.BR>
wrote:

> Hello
>
> I've been making some tests with mapserver 4.4.1 as
> a
> WMS server and I came across a strange behavior (at
> least, from my point of view).
>
> I get a blank image if I type the following URL:
>
http://localhost/cgi-bin/mapserv441.exe?service=wms&version=1.1.1&request=getmap&map=C:\Arquivos%20de%20programas\Apache%20Group\Apache2\htdocs\sigppt\wms.map&layers=area_edificada
>
> Well, the problem is: I get a perfect image, with
> all
> the data I want, if I type
>
http://localhost/cgi-bin/mapserv441.exe?mode=map&map=C:\Arquivos%20de%20programas\Apache%20Group\Apache2\htdocs\sigppt\wms.map&layer=area_edificada
>
> It works if I use project as
>
> PROJECTION
>    "init=epsg:29118"
> END
>
> instead of 29100, but the images returned by wms and
> cgi-bin are different (wms returns a "wider" image).
>
> Note that the map file is exactly the same and that
> both URL work perfect if Mapserver is version 4.0.1.
>
> Could somebody tell me what I'm doing wrong?
>
>
> Thanks to all
>
>
> Sandro
>
>
> The map file is the following:
>
> ----------------------
>
> MAP
> NAME           wms_
> STATUS ON
> IMAGETYPE      PNG24
> EXTENT         -78 -36 -30 8 # minx miny maxx maxy
> SIZE           425 325
> IMAGECOLOR     255 251 234
> SYMBOLSET      "symbols/symbols35.sym"
> FONTSET        "fonts/fonts.list"
> UNITS dd
>
>
> WEB
>   METADATA
>      "WMS_TITLE" "Base de Dados de Testes"
>      "WMS_ONLINERESOURCE"
> "http://localhost/cgi-bin/mapserver441.exe"
>      "WMS_SRS" "EPSG:29100"
>          "WMS_EXTENT" "-78 -36 -30 8"
>   END
> END
>
> PROJECTION
>    "init=epsg:29100"
> END
>
> LAYER
>     NAME area_edificada
>     CONNECTIONTYPE postgis
>     CONNECTION "user=usuario dbname=sig host=host
> password=pass"
>         DATA "geom from area_edificada using unique
> code
> using SRID=29100"
>     STATUS ON
>     TYPE POLYGON
>
>     SIZEUNITS meters
>
>     LABELITEM "code"
>     LABELMAXSCALE 250000
>
>     CLASS
>        NAME 'Area Edificada'
>            COLOR 202 0 0
>        LABEL
>          COLOR 0 0 0
>                  POSITION CC
>                  TYPE truetype
>                  FONT arial
>                  SIZE 25
>        END
>     END
>
>     DUMP TRUE
>
>     METADATA
>        WMS_SRS "EPSG:29100"
>        WMS_TITLE "Area Edificada"
>        WMS_ABSTRACT "Area Edificada"
>        WMS_EXTENT "-78 -36 -30 8"
>     END
> END
>
> END
>
> ----------------------------
>
> =====
> --------------------------------------
> Prof. Msc Sandro Danilo Gatto
> Faculdades Integradas IPEP
> prof_gatto at yahoo.com.br
>
>
>
>
>
>
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