Hi, I guess you could get it as a normally GetFeatureInfo request. We use it usually to retrive the quote from a raster DEM.
You should set a template and do a request GetFeatureInfo with output format = text/html. In the template you should retrieve : the RGB values separatelly for R,G and B or for a raster DEM the quote value. AFAIK The only relevant difference difference is the input format. Infct we use the spatialite using the OGR. But I guess it should work also with postgis provider. regards, A. 2015-01-06 15:58 GMT+01:00 Bill Hudspeth <[email protected]>: > Hello, > > I previously wrote about this issue, but have not found a solution yet. I am > running Mapserver 6.4.1, and am using Postgres/Postgis to display a time > series of geotiff images. I would like to know the best way for a user to > submit a given x,y coordinate pair and return the pixel value for a given > image. Is this possible using only the mapserver api? or must I absolutely > use mapscript? > > Currently, I use a PostgreSQL/PostGIS time-enabled table to store the > information about the location of the geotiffs and the timestamp associated > with them: > > pm25_monthly=# \d pm25_monthly_global > > Table > "public.pm25_monthly_global" > > Column | Type | > Modifiers > > ----------+-----------------------------+----------------------------------------------- > > oid | integer | default nextval('pm25_monthly_seq'::regclass) > rundate | timestamp with time zone | > datetime | timestamp with time zone | > location | text | > timezone | timestamp without time zone | > the_geom | geometry(MultiPolygon,4326) | > > Indexes: > "pm25_monthly_global_oid_key" > UNIQUE CONSTRAINT, btree (oid) > > The 'location' field simply gives the full path to the relevant geotiff on > the file system. And, I define the index in the mapfile: > > #**********LAYER - TILE INDEX FOR PM2.5 RASTERS > (Time sensitive)**** > LAYER > STATUS ON > NAME "pm25_time_index" > TYPE POLYGON > DATA "the_geom from pm25_monthly_global using unique oid using SRID=4326" > METADATA > "ows_title" "PM25 TIME INDEX" > "ows_srs" "EPSG:4326" > "ows_extent" "-180 -90 180 90" #[minx][miny][maxx][maxy] > "wms_timeformat" "YYYY-MM-DDTHH:MM:SS" > "wms_timeextent" "2011-01-01T00:00:00/2012-12-01T00:00:00" > "wms_timeitem" "timezone" > "wms_timedefault" "2011-01-01T00:00:00" > wcs_resolution '0:10 0:10' > END > > #CONNECTION "user=wilbur dbname=pm25_monthly host=localhost > password=iiiiiiiiii" > #CONNECTIONTYPE postgis > CONNECTIONTYPE POSTGIS > CONNECTION "host=127.0.0.1 dbname=pm25_monthly user=wilbur > password=EUR2_live port=5432" > > DATA "the_geom from pm25_monthly_global using unique oid using srid=4326" > END > > #*******LAYER - MONTHLY PM2.5 (Time > Sensitive)********************************* > > LAYER > NAME 'pm25_monthly' > TYPE RASTER > STATUS ON > DEBUG OFF > DUMP TRUE > #TRANSPARENCY 50 > #FILTER "" > > METADATA > "ows_keywordlist" 'PM2.5 (ug/m3), Global' #wms_keywordlist > (Keywordlist) > "ows_description" "Global monthly mean PM 2.5 (ug/m3)concentration" > "ows_name" "Global monthly mean PM2.5 - Concentration Values (ug/m3)" > "ows_label" "Global PM 2.5 (ug/m3)" > "ows_srs" "EPSG:4326 EPSG:900913" > "ows_extent" "-180 -90 180 90" #[minx][miny][maxx][maxy] > "ows_formats" "GEOTIFF" > "ows_nativeformat" "8-bit GeoTIF" > "ows_timeitem" "timezone" > "wms_onlineresource" > "http://localhost/cgi-bin/mapserv?map=/var/www/pm25_mapserver/public_html/pm25_ogc_services.map"; > "wms_abstract" 'Global monthly mean PM 2.5 (ug/m3)concentration' > #wms_abstract(Abstract) > "wms_opaque" '0' #wms_opaque(layer) > "wms_title" "Global monthly mean PM 2.5 (ug/m3)concentration" > "ows_timeformat" "YYYY-MM-DDTHH:MM:SSZ" > "ows_timeextent" "2011-01-01T00:00:00Z/2012-12-01T00:00:00Z" > "ows_timedefault" "2011-01-01T00:00:00Z" > "wms_enable_request" "*" > "wcs_resolution" "0:10 0:10" > "wcs_bandcount" "1" > "wcs_size" "3600 1800" > layer_name pm25_monthly > > END #METADATA > PROJECTION > "init=epsg:4326" #WGS84 Decimal Degrees > END #PROJECTION > > TILEITEM "location" > TILEINDEX "pm25_time_index" > > END #LAYER > > > > Thanks > _______________________________________________ > mapserver-users mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/mapserver-users -- ----------------- Andrea Peri . . . . . . . . . qwerty àèìòù ----------------- _______________________________________________ mapserver-users mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/mapserver-users
