Insert Area Boundaries into GeoData Table

Insert a Polygon Using ST_GeomFromText

Write a MySQL query to insert a polygon into the GeoData table representing an area.

Solution:

-- Insert a new record into the GeoData table, specifying a name and a polygon representing an area.
INSERT INTO GeoData (name, area)

    -- Use the ST_GeomFromText function to create a POLYGON geometry representing the geographic boundaries of 'Central Park Area'.
    VALUES ('Central Park Area', 
            ST_GeomFromText('POLYGON((-73.981 40.768, -73.958 40.768, -73.958 40.800, -73.981 40.800, -73.981 40.768))'));

Explanation:

• Purpose of the Query:
• The goal is to insert spatial polygon data into the database.
• This demonstrates using ST_GeomFromText for polygon data insertion.
• Key Components:
• ST_GeomFromText('POLYGON(...)') : Converts a WKT polygon definition into a spatial object.
• Insertion into the area column of the GeoData table.
• Real-World Application:
• Ideal for mapping areas such as parks, districts, or regions.

Notes:

• Verify that the polygon coordinates are defined in the correct order and format.

For more Practice: Solve these Related Problems:

• Write a MySQL query to insert a new record into "GeoData" with a polygon representing a city boundary using ST_GeomFromText.
• Write a MySQL query to insert a polygon into "MapAreas" that outlines a park using ST_GeomFromText.
• Write a MySQL query to insert a polygon into "SpatialZones" where the polygon defines a restricted area using ST_GeomFromText.
• Write a MySQL query to insert a polygon into "AreaData" that represents a lake’s perimeter using ST_GeomFromText.

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• Hands-on MySQL Spatial Data Exercises Home. ↩
• MySQL Exercises Home ↩

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