How do I connect to a local elevation server?
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How do I connect to a local elevation server?
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Hi,
Since I was having problems using public elevation servers I created one of our own using arcgis. First I generated some tiffs and used gdal to get elevation up and running. This .earth file works and I see elevation just fine. (Elev1.tif is a heightfield). <map name="test" type="geocentric"> <profile>global-geodetic</profile> <image name="world1" driver="gdal"> <url>../../data/Terrain/world/world1.tif</url> <tile_size>256</tile_size> </image> <heightfield name="world1" driver="gdal"> <url>../../data/Terrain/world/Elev1.tif</url> <tile_size>16</tile_size> </heightfield> </map> Next, I tried to connect to the server itself but can‘t seem to get the .earth file right.... <map name="test" type="geocentric"> <heightfield name="world1" driver="wms"> <url>http://gems2/ArcGIS/services/Elevation/MapServer/WMSServer</url> <format>tiff</format> </heightfield> </map> I‘m seeing the following errors printed out... TIFF loader: Error opening file TIFF loader: Error opening file TIFF loader: Error opening file TIFF loader: Error opening file Couldn‘t get tile for 0_0_0 TIFF loader: Error opening file TIFF loader: Error opening file TIFF loader: Error opening file TIFF loader: Error opening file Couldn‘t get tile for 0_1_0 Thoughts? Thanks, Brett |
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jasonbeverage |
Mar 18, 2009; 10:23pm
Re: How do I connect to a local elevation server?
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Hi Brett,
For the WMS driver to work, you need to specify the layers from the WMS to query. So if your elevation layer is called "elevation" then you need to add: <layers>elevation</layers> to your heightfield element to work correctly. You can see an example of this at: http://wush.net/trac/osgearth/wiki/TileSourcePluginWMS Let us know how it goes! Thanks! Jason On Wed, Mar 18, 2009 at 10:02 AM, brett (via Nabble) - No Reply <[hidden email]> wrote:
Hi, ... [show rest of quote]
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jasonbeverage |
Mar 18, 2009; 10:25pm
Re: How do I connect to a local elevation server?
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In reply to this post by brett
Hi Brett,
Forgot to mention, for the WMS elevation, you‘ll probably also want add a <tile_size>16</tile_size> to keep the keep the terrain tile sizes reasonable. Thanks! Jason On Wed, Mar 18, 2009 at 10:23 AM, Jason Beverage <[hidden email]> wrote:
Hi Brett, ... [show rest of quote]
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In reply to this post by brett
Jason,
OK, thanks. One step forward... My map file now uses the heightfield as imagery so I can easily find the areas with big elevations. <map name="test" type="geocentric"> <image name="vmap0" driver="wms"> <url>http://XXXXX/ArcGIS/services/Elevation/MapServer/WMSServer</url> <layers>0</layers> <format>png</format> <tile_size>256</tile_size> </image> <heightfield name="world1" driver="wms"> <url>http://XXXXX/ArcGIS/services/Elevation/MapServer/WMSServer</url> <layers>0</layers> <format>tiff</format> <tile_size>16</tile_size> </heightfield> </map> When I run this I see no elevation neither with osgviewer. Because I see elevation when I connect to the pelican server (except those rare cases when the nextwork gives me trouble) I believe this to be a configuration problem with my .earth file or wms server. Anyway to tell? Thanks, Brett |
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Brett, can you post your WMS capabilities XML? thanks
http://XXXXX/ArcGIS/services/Elevation/MapServer/WMSServer?request=GetCapabilities Glenn Waldron / Pelican Mapping / @glennwaldron
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Hey Glenn,
Here are the WMS server capabilities: <?xml version="1.0" encoding="UTF-8"?> <WMS_Capabilities version="1.3.0" xmlns="http://www.opengis.net/wms" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.opengis.net/wms http://schemas.opengis.net/wms/1.3.0/capabilities_1_3_0.xsd"> <Service> <Name>WMS</Name> <Title>Elevation</Title> <Abstract>WMS</Abstract> <KeywordList><Keyword></Keyword></KeywordList> <OnlineResource xmlns:xlink="http://www.w3.org/1999/xlink" xlink:type="simple" xlink:href="http://gems2/ArcGIS/services/Elevation/MapServer/WMSServer"/> <ContactInformation> <ContactPersonPrimary> <ContactPerson></ContactPerson> <ContactOrganization></ContactOrganization> </ContactPersonPrimary> <ContactPosition></ContactPosition> <ContactAddress> <AddressType></AddressType> <Address></Address> <City></City> <StateOrProvince></StateOrProvince> <PostCode></PostCode> <Country></Country> </ContactAddress> <ContactVoiceTelephone></ContactVoiceTelephone> <ContactFacsimileTelephone></ContactFacsimileTelephone> <ContactElectronicMailAddress></ContactElectronicMailAddress> </ContactInformation> <Fees></Fees> <AccessConstraints></AccessConstraints> <MaxWidth>2048</MaxWidth> <MaxHeight>2048</MaxHeight> </Service> <Capability> <Request> <GetCapabilities> <Format>application/vnd.ogc.wms_xml</Format> <Format>text/xml</Format> <DCPType> <HTTP><Get><OnlineResource xmlns:xlink="http://www.w3.org/1999/xlink" xlink:type="simple" xlink:href="http://gems2/ArcGIS/services/Elevation/MapServer/WMSServer"/></Get></HTTP> </DCPType> </GetCapabilities> <GetMap> <Format>image/bmp</Format> <Format>image/jpeg</Format> <Format>image/tiff</Format> <Format>image/png</Format> <Format>image/gif</Format> <Format>image/svg+xml</Format> <DCPType> <HTTP><Get><OnlineResource xmlns:xlink="http://www.w3.org/1999/xlink" xlink:type="simple" xlink:href="http://gems2/ArcGIS/services/Elevation/MapServer/WMSServer"/></Get></HTTP> </DCPType> </GetMap> <GetFeatureInfo> <Format>application/vnd.ogc.wms_xml</Format> <Format>text/xml</Format> <Format>text/html</Format> <Format>text/plain</Format> <DCPType> <HTTP><Get><OnlineResource xmlns:xlink="http://www.w3.org/1999/xlink" xlink:type="simple" xlink:href="http://gems2/ArcGIS/services/Elevation/MapServer/WMSServer"/></Get></HTTP> </DCPType> </GetFeatureInfo> </Request> <Exception> <Format>application/vnd.ogc.se_xml</Format> <Format>application/vnd.ogc.se_inimage</Format> <Format>application/vnd.ogc.se_blank</Format> <Format>text/xml</Format> <Format>XML</Format> </Exception> <Layer> <Title>Layers</Title> <CRS>CRS:84</CRS> <CRS>EPSG:4326</CRS> <EX_GeographicBoundingBox> <westBoundLongitude>-198.000002</westBoundLongitude> <eastBoundLongitude>198.000019</eastBoundLongitude> <southBoundLatitude>-99.000002</southBoundLatitude> <northBoundLatitude>99.000009</northBoundLatitude> </EX_GeographicBoundingBox> <BoundingBox CRS="CRS:84" minx="-198.000002" miny="-99.000002" maxx="198.000019" maxy="99.000009"/> <BoundingBox CRS="EPSG:4326" minx="-99.000002" miny="-198.000002" maxx="99.000009" maxy="198.000019"/> <Layer> <Name>0</Name> <Title>con_isnull_g1</Title> <Abstract>con_isnull_g1</Abstract> <CRS>CRS:84</CRS> <CRS>EPSG:4326</CRS> <EX_GeographicBoundingBox> <westBoundLongitude>-180.000001</westBoundLongitude> <eastBoundLongitude>180.000018</eastBoundLongitude> <southBoundLatitude>-90.000001</southBoundLatitude> <northBoundLatitude>90.000008</northBoundLatitude> </EX_GeographicBoundingBox> <BoundingBox CRS="CRS:84" minx="-180.000001" miny="-90.000001" maxx="180.000018" maxy="90.000008"/> <BoundingBox CRS="EPSG:4326" minx="-90.000001" miny="-180.000001" maxx="90.000008" maxy="180.000018"/> <Style> <Name>default</Name> <Title>con_isnull_g1</Title> <LegendURL width="100" height="97"> <Format>image/png</Format> <OnlineResource xlink:href="http://gems2/arcgisoutput/Elevation_MapServer/wms/default0.png" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink" /> </LegendURL> </Style> </Layer> </Layer> </Capability> </WMS_Capabilities> Does this tell you anything useful? Thanks, Brett |
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Brett,
This might be an ArcGIS Server issue. I ran a test, adding some 1-channel 32-bit float SRTM data to an MXD and publishing as a Map service. The resulting TIFFs are RGB 3-channel, not 1-channel. In other words, AGS rendered the elevation data to a regular image, making it useless to osgEarth. (Side note: in MapServer, the open source WMS server, you can explicitly configure the output formats and achieve the desired effect.) I don‘t see a way offhand to configure AGS to do this. An alternative would be to publish the layer as a WCS service (which provides raw access to the source data). However ... the osgEarth WCS driver is not mature yet and will probably require some addition work on our end. |
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