GIS_POINT: Building a Geometry Point

How to:

Given a WKID (Well-Known ID) spatial reference, longitude, and latitude, the GIS_POINT function builds a JSON point defining a Geometry object with the provided WKID, longitude, and latitude. The function is optimized for those SQL engines that can build a JSON geometry object.

The field to which the point is returned should have fixed length alphanumeric format, large enough to hold the JSON describing the point (for example, A200).

Syntax: How to Build a Geometry Point 

GIS_POINT(wkid, longitude, latitude)

where:

wkid

Fixed length alphanumeric

Is a spatial reference code (WKID). WKID is an abbreviation for Well-Known ID, which identifies a projected or geographic coordinate system.

longitude

D20.8

Is the longitude for the point.

latitude

D20.8

Is the latitude for the point.

Example: Building a Geometry Point

The following request uses the spatial reference code 4326 (decimal degrees) and state capital longitudes and latitudes to build a geometry point. 

DEFINE FILE WF_RETAIL_LITE
GPOINT/A200 = GIS_POINT('4326', STATE_PROV_CAPITAL_LONGITUDE, STATE_PROV_CAPITAL_LATITUDE);
END
TABLE FILE WF_RETAIL_LITE
SUM FST.STATE_PROV_CAPITAL_LONGITUDE AS Longitude
FST.STATE_PROV_CAPITAL_LATITUDE AS Latitude 
FST.GPOINT AS Point
BY STATE_PROV_CAPITAL_NAME AS Capital
WHERE COUNTRY_NAME EQ 'United States'
WHERE STATE_PROV_CAPITAL_NAME LT 'C'
ON TABLE SET PAGE NOPAGE
END

The output is shown in the following image.

Example: Charting Geometry Points

The following request generates geometry points using GIS_POINT charts them on an Esri map. 

DEFINE FILE WF_RETAIL
GPOINT/A200 = GIS_POINT('4326', STATE_PROV_CAPITAL_LONGITUDE, STATE_PROV_CAPITAL_LATITUDE);
END
 GRAPH FILE WF_RETAIL
 PRINT
 STATE_PROV_NAME
 WHERE STATE_PROV_CAPITAL_LONGITUDE NE MISSING
 ON TABLE PCHOLD FORMAT JSCHART 
 ON TABLE SET LOOKGRAPH BUBBLEMAP 
 ON TABLE SET EMBEDHEADING ON 
 ON TABLE SET AUTOFIT ON 
 ON TABLE SET STYLE * 
  TYPE=REPORT, TITLETEXT='Map', PAGESIZE=E, CHART-LOOK=com.esri.map, $ 
  TYPE=DATA, COLUMN=N1, 
   BUCKET=tooltip, $ 
  *GRAPH_JS_FINAL 
"bubbleMarker": {"maxSize": "10%"}, 
"legend": {"visible": true}, 
"extensions" : { "com.esri.map" : 
  { "scalebar" : 
{ 
    "scalebarUnit": "dual", 
    "attachTo" : "bottom-left" 
  }, 
  "baseMapInfo": { 
       "drawBasemapControl" : false, 
       "showArcGISBasemaps" : false, 
            "customBaseMaps" : [ 
            {"ibiBaseLayer" : "gray"} 
        ] 
   }, 
  "overlayLayers": 
  [{ 
  "ibiDataLayer": {"map-geometry" :  {"map_by_field" : "GPOINT"}}, "title" : "Report"}] 
  }, 
"introAnimation": "{\"enabled\":false}" 
} 
 
  *END 
 ENDSTYLE 
 HEADING 
  "Chart Geometry Points" 
END

The output is shown in the following image.