OGC Standard Geometry
POINT
WKT POINT: Single Location Coordinate Syntax
Direct Definition:A WKT POINT represents a single 2D or 3D location in space. In standard GIS and PostGIS conventions (EPSG:4326), it is written with longitude (X) first and latitude (Y) second.
Valid Syntax & Example
POINT (-77.0428 -12.0464)
Syntax: POINT (longitude latitude)
Common Mistakes to Avoid
⚠️ Gotcha:
Swapping latitude and longitude (writing POINT(lat lon)). Latitudes outside [-90, 90] will fail parser validation.
PostGIS SQL Query Recipes
Creating and querying POINT geometries in PostgreSQL:
1. Construct POINT from WKT
SELECT ST_SetSRID(ST_MakePoint(-77.0428, -12.0464), 4326);
2. Export POINT to WKT text
SELECT ST_AsText(geom) FROM locations;
Python & Shapely Parsing
from shapely import wkt
point = wkt.loads("POINT (-77.0428 -12.0464)")
print("X (lon):", point.x, "Y (lat):", point.y)Frequently Asked Questions
Why does longitude come first in WKT POINT?+
WKT follows Cartesian coordinate conventions (X before Y). On maps, East-West (Longitude) corresponds to X, and North-South (Latitude) corresponds to Y.
Convert POINT to Another Format
Every converter below accepts POINT and runs entirely in your browser.
All GIS format converters →