GetFeatureInfo on ESRI binary grid

[Frans Knibbe]

Hello,

I had not read the document Jim mentioned, but it nicely explains why,
for an ArcINFO grid, setting a path to a grid directory yields the same
results as setting a path to a file within that directory.

I had read this document:
http://mapserver.gis.umn.edu/cgi-bin/wiki.pl?RasterQuery
It explains that after MapServer 4.2 you should be able to perform
queries on rasters.

And a thread in this list about the subject:
http://mapserver.gis.umn.edu/data2/wilma/mapserver-users/0406/msg00600.html
,
where the question is asked whether the getFeatureInfo request will work
on raster layers.

I am wondering now if getFeatureInfo does not work on raster layers, or
if I have made a mistake in the map configuration. If anyone has
succeeded in querying a raster layer using getFeatureInfo,  it would be
nice to see the layer definition in the map file.

Greetings,

Frans

Jim wrote:

>ok I guess I didnt understand what kind of file you were using. Your right,
>you can provide the directory or a filename.
>
>Did you read this document?
>http://www.remotesensing.org/gdal/frmt_various.html#AIG
>
>Jim Burnett
>Visual Basic GIS Project Leader
>http://www.visualbasicgis.com/
>http://www.gisforums.com/
>
>
>----- Original Message -----
>From: "Frans Knibbe" <frans at geodan.nl>
>To: "Jim" <jim at e-masi.com>
>Cc: <MAPSERVER-USERS at LISTS.UMN.EDU>
>Sent: Monday, September 20, 2004 10:22 AM
>Subject: Re: [UMN_MAPSERVER-USERS] GetFeatureInfo on ESRI binary grid
>
>
>
>
>>Jim wrote:
>>
>>
>>
>>>For raster layers you need the file extension too.
>>>DATA "E:\data\elevation.tif"  or whatever it is.
>>>
>>>
>>>
>>>
>>Are you sure? An ArcInfo grid is not a single file, but a directory
>>containing several files. I have just tried using a filename
>>(E:\data\elevation\w001001.adf), but I got the same results: GetMap
>>works, but GetFeatureInfo doesn't. If I should use a filename in stead
>>of the directoryname, which of the files should I use?
>>
>>
>>
>>>-jim
>>>
>>>Jim Burnett
>>>Visual Basic GIS Project Leader
>>>http://www.visualbasicgis.com/
>>>http://www.gisforums.com/
>>>
>>>
>>>----- Original Message -----
>>>From: "Frans Knibbe" <frans at GEODAN.NL>
>>>To: <MAPSERVER-USERS at LISTS.UMN.EDU>
>>>Sent: Monday, September 20, 2004 9:11 AM
>>>Subject: [UMN_MAPSERVER-USERS] GetFeatureInfo on ESRI binary grid
>>>
>>>
>>>
>>>
>>>
>>>
>>>>Hello people,
>>>>
>>>>I am using mapserver 4.2.3 with GDAL and I have a problem. Maybe someone
>>>>can help? I am trying to get the GetFeatureInfo request to work on an
>>>>ArcInfo grid. The grid displays well. Here is a part of the map file in
>>>>its current shape:
>>>>
>>>> LAYER
>>>>   NAME "elevation"
>>>>   DATA "E:\data\elevation"
>>>>   TYPE RASTER
>>>> END
>>>>
>>>> LAYER
>>>>   STATUS ON
>>>>   NAME "elevation_query"
>>>>   DATA "E:\data\elevation"
>>>>   TYPE QUERY
>>>>   DUMP TRUE
>>>>   TEMPLATE template.htm
>>>> END
>>>>
>>>>As you can see, I have defined two layers, one for display and one for
>>>>query. This is because I could not get the "type raster" layer to become
>>>>queryable. When I request the capabilities, the second layer is reported
>>>>to be queryable, but the first not. However, a getFeatureInfo request
>>>>results in the following error:
>>>>
>>>><ServiceException>
>>>>msSHPOpenFile(): Unable to access file. (E:\data\elevation)
>>>>msSHPOpenFile(): Unable to access file. (E:\data\elevation)
>>>></ServiceException>
>>>>
>>>>Is there something I am obviously doing wrong? Is there another raster
>>>>format that might work better?
>>>>
>>>>Thanks in advance,
>>>>
>>>>Frans
>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>>
>
>
>
>