[Mapserver-users] ArcGrid format.

[ANDREW WOOLEY]

I have been in the process (a very long one, I might add) of moving my
map apps to a new server with the latest version of MapServer.  So, I
don't have a fully functioning version of my mapping that uses this
layer, but I do have it working - that is generating a map.  You can
check it out at http://66.89.102.144/doqq.phtml  (if the NED doesn't
draw, just refresh until it does, it seems to go out at times). This was
just my test to see if I could get it to work and overlay some vector
data. It works, but I have not integrated it into any of my fully
functional maps, yet.

The biggest drawbacks I can see to using it are 1) it takes much longer
to load the map than if it is a static TIF, like I have been using in
other maps.  The TIF works for me because my maps are almost exclusively
just Northern Utah. If I didn't have to reproject the NED layer, it
would probably just as fast, I assume. and 2) to get it to look good and
clear, you have to do 24 bit images (as I understand it) and they are
huge.  The one generated in my demo is ~330kb.  That is much too large
for most of the users.  I think the speed and small images are what make
MapServer the best choice for this thing and when those are lost, it
starts to lose its value. If I wanted slow loading maps I would have
gone with ArcIMS :).

Anyway, if you follow the link I provided, you can see the image and
view the map file.  As I mentioned before, the WMS bit I gathered off
the list. I really don't know what I am doing when it comes to the WMS
stuff.  Thanks again to whoever provided it.

Andrew

>>> Bob Basques <bob.basques at ci.stpaul.mn.us> 4/27/2004 2:48:59 PM >>>
Andrew,

Can you publish(or provide a copy of) a (more)complete mapfile that you

use this in?  I've been menaing to test this service, just haven't 
gotten around to for one reason or another.

bobb

ANDREW WOOLEY wrote:

>Jason,
>
>This isn't really the answer you were looking for, but I thought it
>might help.
>
>To display the NED Hillshade, I use the USGS wms.  
>
>This is the mapfile code (I got it from the list but don't remember
who
>posted - sorry):
>LAYER
> NAME "wms_ned"
> TYPE RASTER
> STATUS ON
> 
> #PROCESSING "COLOR_MATCH_THRESHOLD=3"       # Suggest in listserv
for
>transparencies
> #OFFSITE 0 0 0                              # SEEMS TO REMOVE PIXELS
>OF A CERTAIN VALUE
> CONNECTION
>"http://gisdata.usgs.net:80/servlet/com.esri.wms.Esrimap?servicename=USGS_WMS_NED&"
> CONNECTIONTYPE WMS
> METADATA
>        "wms_srs"             "EPSG:4326"
>        "wms_name"            "US_NED_Shaded_Relief"
>        "wms_server_version"  "1.0.0"
>        "wms_format"          "image/jpeg"
> END
> PROJECTION
>        "init=epsg:26912"
> END
>END
>
>It is for display purposes only. If you were looking to do something
>other than query, I don't know if it is possible to query grids in
>mapserver.  There was some list discussion on that earlier, but I
can't
>recall if it was resolved.  
>
>The other option that I have used is to create images from the grid
>data and display that.
>
>I hope this is helpful.
>
>Andrew
>
>  
>
>>>>"Jason M. Nielsen" <jnielsen at aero-graphics.com> 4/27/2004 12:01:49
>>>>        
>>>>
>PM >>>
>This is more a gdal question I suppose but thought I would see about
>picking
>some brains here.
>
>Is anyone out there using ArcGrid files with mapserver?  More
>specifically
>something like the data at:
>
>data.geocomm.com/readme/usgs/ned.html
>
>I noticed Arc/Info binary grid support is listed in gdal but I was
not
>sure if
>this is the same.
>
>Thanks.
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