GIS_SERVICE_AREA: Calculating a Geometry Area Around a Given Point
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How to: |
The GIS_SERVICE_AREA function uses a GIS service to calculate the geometry area with access boundaries within the given time or distance from the provided geometry point. The output is returned in text format.
Syntax: How to Calculate a Geometry Area Around a Point
GIS_SERVICE_AREA(geo_point, distance, travel_mode)
where:
- geo_point
-
Alphanumeric
Is the starting geometry point.
- distance
-
Alphanumeric
Is the travel limitation in either time or distance units.
- travel_mode
-
Alphanumeric
Is a valid travel mode as defined in gis_serv_area.mas in the Catalog directory under the server installation directory. The accepted travel modes are;
- 'Miles'. This is the default value.
- 'TravelTime'.
- 'TruckTravelTime'.
- 'WalkTime'.
- 'Kilometers'.
Example: Calculating a Service Area Around a Geometry Point
The following request calculates the geometry area that is a five-minute walk around a station.
DEFINE FILE esri/esri-citibike
WKID/A10='4326';
START_STATION_POINT/A200=GIS_POINT(WKID, START_STATION_LONGITUDE, START_STATION_LATITUDE);
DISTANCE/A10='5';
TRAVEL_MODE/A10='WalkTime';
STATION_SERVICE_AREA/TX80 (GEOGRAPHIC_ROLE=GEOMETRY_AREA)=
GIS_SERVICE_AREA(START_STATION_POINT, DISTANCE, TRAVEL_MODE);
END
TABLE FILE esri/esri-citibike
PRINT
START_STATION_ID AS 'Station ID'
START_STATION_NAME AS 'Station Name'
STATION_SERVICE_AREA AS '5-Minute Walk Service Area Around Station'
WHERE START_STATION_ID EQ 479 OR 512;
ON TABLE SET PAGE NOLEAD
ON TABLE SET STYLE *
TYPE=REPORT, GRID=OFF, SIZE=12,$
ENDSTYLE
END The output is shown in the following image.
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