Database Reference
In-Depth Information
14. Trytonavigatethemap;ateachzoomandpanaction,GeoServerwillstream
out a new image provided by the response output to a GetMap request.
By clicking on the map, you can perform a GetFeatureInfo request and
the user interface will display the feature's attributes corresponding to the
point on the map on which you clicked. An effective way to check how the
requests are sent to GeoServer as you navigate the map is by using the
FirefoxFirebugpluginortheChrome(orChromium,ifyouareusingLinux)
DeveloperTools.Withthesetools,youwillbeabletoidentifythe GetMap and
GetFeatureInfo requeststhatarebeingsentbehindthescenesfromthe
OpenLayers viewertoGeoServer.Onesuchmapisshowninthefollowing
screenshot:
15. Now, try a WMS GetMap request by typing the URL, ht-
tp://localhost:8080/geoserver/postgis_cookbook/
wms?LAYERS=postgis_cookbook%3Acounties&STYLES=&FORMAT=image%2Fpng&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&SRS=EPSG%3A4326&BBOX=-200.50286594033,7.6152902245522,-43.196688503029,81.457450330258&WIDTH=703&HEIGHT=330 ,
in your browser.
16. Try a WMS GetFeatureInfo request, as well, by typing the URL ht-
tp://localhost:8080/geoserver/postgis_cookbook/
wms?REQUEST=GetFeatureInfo&EXCEPTIONS=application%2Fvnd.ogc.se_xml&BBOX=-126.094303%2C37.16812%2C-116.262667%2C41.783255&SERVICE=WMS&INFO_FORMAT=text%2Fhtml&QUERY_LAYERS=postgis_cookbook%3Acounties&FEATURE_COUNT=50&Layers=postgis_cookbook%3Acounties&WIDTH=703&HEIGHT=330&format=image%2Fpng&styles=&srs=EPSG%3A4326&version=1.1.1&x=330&y=158 .
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