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ST_GoogleMapLink

Signature

VARCHAR ST_GoogleMapLink(GEOMETRY geom);
VARCHAR ST_GoogleMapLink(GEOMETRY geom, VARCHAR layerType);
VARCHAR ST_GoogleMapLink(GEOMETRY geom, VARCHAR layerType, INTEGER zoom);

Description

Create a Google Map link based on the center of the bounding box (bbox) of a geometry.

Two optionnal parameters:

  • layerType: specify the layer type → m (normal map) , k (satellite), h (hybrid), p (terrain). Default value is m,

  • zoom: set a zoom level between 1 and 19. Default value is 19.

Remark

The geometry must be exprimed in WGS84 (EPSG:4326).

To transform from your projection system to WGS84, please read ST_SetSRID (if the current projection is not already defined) and ST_Transform functions.

Examples

Use case with the Castle of Nantes, which coordinates are exprimed in the French projection system “Lambert 93” (EPSG:2154). The geometry is stored in a table called NANTES_CASTLE.

| the_geom MULTIPOLYGON               |
|-------------------------------------|
| MULTIPOLYGON (((355815.5 6689436.9, 355816.1 6689439.3, 355817.3 6689441.4, 355818.9 6689443.3, 355820.7 6689444.5, 355822.9 6689445.3, 355827.7 6689445.7, 355831.9 6689458.7, 355829.8 6689459.9, 355828 6689461.2, 355826.6 6689463.5, 355826.2 6689466.1, 355826.7 6689468.2, 355827.5 6689469.6, 355829.1 6689471.1, 355831.5 6689472.1, 355834.3 6689472.1, 355836.5 6689471.4, 355838.9 6689477.4, 355838 6689477.6, 355835.9 6689478.6, 355834.3 6689480.2, 355833.8 6689481.2, 355833.2 6689482.7, 355833.1 6689484.8, 355833.7 6689486.9, 355835 6689488.6, 355837 6689490, 355839.7 6689490.5, 355841.8 6689490.2, 355843.2 6689489.4, 355845.4 6689488.6, 355848.2 6689495.7, 355852.5 6689494.1, 355850 6689488.2, 355849.5 6689488.3, 355849 6689487, 355847.1 6689482.3, 355854.6 6689479.4, 355855.3 6689480.9, 355856.3 6689480.5, 355842.3 6689445.5, 355844.6 6689443.6, 355845.2 6689441.2, 355846.1 6689440.9, 355847.2 6689441.2, 355847 6689441.8, 355847.6 6689442, 355847.8 6689441.2, 355849.5 6689440.5, 355850.2 6689440.7, 355850.5 6689440.1, 355850.1 6689440.1, 355850.7 6689437.6, 355851.1 6689437.6, 355851.1 6689437.1, 355850.4 6689437, 355859 6689407.7, 355862.3 6689396.8, 355866 6689397.7, 355866.4 6689396.9, 355907 6689416.9, 355904.2 6689423.3, 355930.6 6689436.3, 355935 6689430.8, 355940.2 6689434.5, 355940.4 6689435.3, 355939.2 6689435.8, 355955.1 6689485.7, 355958.1 6689485.1, 355958.1 6689486.5, 355958.9 6689487.5, 355960.5 6689495.3, 355957.3 6689494.8, 355956.8 6689493.3, 355931.7 6689498.4, 355926.9 6689498.8, 355903.4 6689502.1, 355904.3 6689499.5, 355901.4 6689494.7, 355901.7 6689490.7, 355897.4 6689483.6, 355889.4 6689488.1, 355889.7 6689488.6, 355888 6689490.2, 355887.5 6689490, 355887.2 6689490.6, 355887.6 6689490.7, 355888.1 6689493.3, 355887.7 6689493.5, 355887.8 6689494, 355887 6689494.3, 355887.3 6689495.3, 355889.5 6689494.8, 355890.5 6689495.3, 355891.9 6689500.4, 355889.1 6689500.9, 355889.4 6689502.6, 355889.9 6689502.5, 355891.8 6689510.4, 355889.8 6689510.6, 355889.9 6689514.8, 355886.9 6689515.7, 355885.6 6689522.9, 355907 6689528.7, 355903.8 6689511.1, 355904.9 6689511, 355906 6689510.5, 355906.1 6689509.3, 355905.9 6689508.5, 355933 6689506.3, 355954.3 6689500.6, 355957 6689502.7, 355975.4 6689503.8, 355978.9 6689503.7, 355980.8 6689503.4, 355983.6 6689502.4, 355986.1 6689500.7, 355987.5 6689499.2, 355988.6 6689497.5, 355989.7 6689494.8, 355990.2 6689491.8, 355990 6689489.8, 355989.3 6689487.2, 355988.4 6689485.4, 355987.3 6689483.9, 355984.8 6689481.7, 355982.2 6689480.4, 355977.1 6689480.1, 355958.7 6689481.6, 355944.4 6689437.9, 355947.3 6689431.9, 355947.5 6689430.7, 355947.5 6689428.2, 355946.5 6689425.8, 355945.9 6689425, 355943.8 6689423.4, 355942.3 6689422.8, 355940.5 6689422.5, 355938.6 6689422.7, 355937 6689423.4, 355935.5 6689424.4, 355934.4 6689425.8, 355933.6 6689427.4, 355910.2 6689415.8, 355908.1 6689414.7, 355860.1 6689390.1, 355859 6689386, 355858.4 6689384.6, 355857.2 6689382.9, 355856 6689382, 355854.7 6689381.3, 355851.7 6689380.7, 355848.7 6689381.5, 355847.9 6689382, 355846.2 6689383.6, 355845.5 6689385, 355845.1 6689387.1, 355845.3 6689388.9, 355845.7 6689390.4, 355846.4 6689391.9, 355847.6 6689393.2, 355849 6689394.1, 355850 6689394.5, 355846.6 6689401.7, 355846.2 6689402.6, 355838 6689429.1, 355831.5 6689427.5, 355826.7 6689426.4, 355824.2 6689426.4, 355821.7 6689426.9, 355819.5 6689428.1, 355817.8 6689429.7, 355816.5 6689431.6, 355815.7 6689433.9, 355815.5 6689436.9)), ((355932.4 6689440.8, 355915.2 6689446.6, 355929 6689490.4, 355946.4 6689484.8, 355932.4 6689440.8)))  |

1rst signature
SELECT ST_GoogleMapLink(ST_TRANSFORM(ST_SETSRID(THE_GEOM, 2154), 4326)) as URL FROM NANTES_CASTLE;

-- Answer: https://maps.google.de/maps?q=47.216144057013466,-1.5491151739830427&z=19&t=m

2nd signature, with layerType parameter
SELECT ST_GoogleMapLink(ST_TRANSFORM(ST_SETSRID(THE_GEOM, 2154), 4326), 'k') as URL FROM NANTES_CASTLE;

-- Answer: https://maps.google.de/maps?q=47.216144057013466,-1.5491151739830427&z=19&t=k

3rd signature, with zoom parameter
SELECT ST_GoogleMapLink(ST_TRANSFORM(ST_SETSRID(THE_GEOM, 2154), 4326), 'm', 10) as URL FROM NANTES_CASTLE;

-- Answer: https://maps.google.com/maps?ll=47.216144057013466,-1.5491151739830427&z=10&t=m

SELECT ST_GoogleMapLink(ST_TRANSFORM(ST_SETSRID(THE_GEOM, 2154), 4326), 'm', 19) as URL FROM NANTES_CASTLE;

-- Answer: https://maps.google.com/maps?ll=47.216144057013466,-1.5491151739830427&z=19&t=m

See also