[Mapserver-users] WMS client layer and TerraServer

Fri Feb 14 08:17:44 PST 2003

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Brian -
=20
If you're going to be using a WMS client, I would recommend moving up to =
3.7.  The 3.6x versions used libwww for HTTP transfers, and 3.7 uses the =
much simpler libcurl to do that.  Since WMS support is clearly an =
active, ongoing development area, it's worth it to make the change now =
and avoid the libwww process.
=20
We have used TerraServer's WMS interface.  I'm not sure exactly what =
problem you've having with the images - certainly, if you're adding =
other data on top and need more palette space, moving up to 3.7/GD 2.x =
will be a big improvement.
=20
We offer USGS DOQQs and DRGs as OGC WMS services for commercial =
customers.  They are not free.  Given the considerable expense involved =
in providing this data online, we think they're pretty affordably =
priced, but they're not "cheap".  The DRGs are much less expensive than =
the DOQQs.  Unlike TerraServer, the data we have available as WMS layers =
is full-resolution GeoTIFF data as it is delivered from the USGS.  The =
TerraServer imagery is converted to JPEGs to save space, and that can =
make a noticeable difference.
=20
    - Ed
Ed McNierney
President and Chief Mapmaker
TopoZone.com / Maps a la carte, Inc.
73 Princeton Street, Suite 305
North Chelmsford, MA  01863
ed at topozone.com
(978) 251-4242=20

-----Original Message-----
From: Brian Fischer [mailto:bfischer at mpls.houstoneng.com]
Sent: Friday, February 14, 2003 9:40 AM
To: mapserver-users at lists.gis.umn.edu
Subject: [Mapserver-users] WMS client layer and TerraServer

I would like to add the TerraServer WMS as a layer in an application, =
but I am not sure what version and compiled support for MapServer I need =
to make this work.  I am currently using 3.6.3 and I know it does not =
work with that version.  Will I need to upgrade to 3.7 or will 3.6.4 =
work?

=20

Is anyone else successfully using the TerraServer as a WMS layer?  I =
know there have been past post that said it works with 3.7, but unless =
you are using GD2.x the image does not look the best.  Are there any =
other free sources or very cheap sources for USGS DOQ's and DRG's as a =
WMS Service?

=20

Thanks,

Brian

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<DIV><SPAN class=3D875200416-14022003><FONT face=3DArial color=3D#0000ff =
size=3D2>Brian=20
-</FONT></SPAN></DIV>
<DIV><SPAN class=3D875200416-14022003><FONT face=3DArial color=3D#0000ff =

size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D875200416-14022003><FONT face=3DArial color=3D#0000ff =
size=3D2>If=20
you're going to be using a WMS client, I would recommend moving up to =
3.7. =20
The 3.6x versions used libwww for HTTP transfers, and 3.7 uses the much =
simpler=20
libcurl to do that.  Since WMS support is clearly an active, =
ongoing=20
development area, it's worth it to make the change now and avoid the =
libwww=20
process.</FONT></SPAN></DIV>
<DIV><SPAN class=3D875200416-14022003><FONT face=3DArial color=3D#0000ff =

size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D875200416-14022003><FONT face=3DArial color=3D#0000ff =
size=3D2>We=20
have used TerraServer's WMS interface.  I'm not sure exactly what =
problem=20
you've having with the images - certainly, if you're adding other data =
on top=20
and need more palette space, moving up to 3.7/GD 2.x will be a big=20
improvement.</FONT></SPAN></DIV>
<DIV><SPAN class=3D875200416-14022003><FONT face=3DArial color=3D#0000ff =

size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D875200416-14022003><FONT face=3DArial color=3D#0000ff =
size=3D2>We=20
offer USGS DOQQs and DRGs as OGC WMS services for commercial =
customers. =20
They are not free.  Given the considerable expense involved in =
providing=20
this data online, we think they're pretty affordably priced, but they're =
not=20
"cheap".  The DRGs are much less expensive than the DOQQs.  =
Unlike=20
TerraServer, the data we have available as WMS layers is full-resolution =
GeoTIFF=20
data as it is delivered from the USGS.  The TerraServer imagery is=20
converted to JPEGs to save space, and that can make a noticeable=20
difference.</FONT></SPAN></DIV>
<DIV><SPAN class=3D875200416-14022003><FONT face=3DArial color=3D#0000ff =

size=3D2> </DIV>
<DIV>    - Ed</DIV>
<DIV>
Ed McNierney President and Chief =
Mapmaker TopoZone.com /=20
Maps a la carte, Inc. 73 Princeton Street, Suite 305 North =
Chelmsford,=20
MA  01863 ed at topozone.com (978) 251-4242 =
</DIV>
<BLOCKQUOTE dir=3Dltr style=3D"MARGIN-RIGHT: 0px">
 <DIV class=3DOutlookMessageHeader dir=3Dltr align=3Dleft>-----Original Message----- From: Brian Fischer=20
 [mailto:bfischer at mpls.houstoneng.com] Sent: Friday, February =
14,=20
 2003 9:40 AM To:=20
 mapserver-users at lists.gis.umn.edu Subject: [Mapserver-users] =
WMS=20
 client layer and TerraServer </DIV>
 <DIV class=3DSection1>
 <SPAN=20
 style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial">I would like to add the=20
 TerraServer WMS as a layer in an application, but I am not sure what =
version=20
 and compiled support for MapServer I need to make this work.  I =
am=20
 currently using 3.6.3 and I know it does not work with that =
version. =20
 Will I need to upgrade to 3.7 or will 3.6.4 work?
 <SPAN=20
 style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial"> 
 <SPAN=20
 style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial">Is anyone else =
successfully using=20
 the TerraServer as a WMS layer?  I know there have been past post =
that=20
 said it works with 3.7, but unless you are using GD2.x the image does =
not look=20
 the best.  Are there any other free sources or very cheap sources =
for=20
 USGS DOQ’s and DRG’s as a WMS Service?
 <SPAN=20
 style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial"> 
 <SPAN=20
 style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
Arial">Thanks,
 <SPAN=20
 style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
Arial">Brian</DIV></BLOCKQUOTE></BODY></HTML>

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