WKT (Well-Known Text) is 'n teksvoorstelling van geometriese voorwerpe volgens die OGC-standaard.

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WKT (Well-Known Text)

Open Beta

.wkt · text/plain

WKT is 'n teksvoorstellingsformaat vir geometrieë, wat in databasisse (PostGIS, SpatiaLite) en GIS-toepassings gebruik word. Eenvoudig en maklik om te integreer.

Voer WKT nou uit ✨ Oop beta — gratis, geen beperkings nie

Sleutelkenmerke

✓Teksformaat

✓OGC-standaard

✓Maklike DB-integrasie

✓Alle geometrietipes ondersteun

Oor die WKT-formaat

WKT (Well-Known Text) is the textual encoding of geometry from the OGC standard: POINT(37.6177 55.7558), LINESTRING(...), POLYGON((...)). It is understood by every spatial database and library — PostGIS, SpatiaLite, Shapely, JTS, GEOS — and it can be read by eye, which makes the format indispensable while debugging.

The export is taken when geometry is needed as text: to paste into an SQL query, to put into a test, to pass coordinates to someone else's system, to take a quick look at what came out of the selected area at all.

The output is a single text file in UTF-8. At the top are comments with the bounding box of the area and the coordinate system, then it goes layer by layer: a line like "-- layer: roads" with one geometry per line underneath it. Coordinates are in WGS84 (EPSG:4326) with six decimal places — that is about ten centimeters on the ground.

One important thing: WKT stores shapes only. There are no names, types or other OpenStreetMap tags in the file — if you need attributes, take GeoJSON, GeoPackage or a CSV with a WKT column.

Watter program open WKT-lêers

Die volgende programme en toepassings kan WKT (Well-Known Text) (.wkt)-lêers wat uit OSM2CDR uitgevoer is, open, redigeer en daarmee werk:

💻PostGIS 💻SpatiaLite 🌎QGIS 💻Shapely (Python) 💻JTS (Java) 💻GEOS

Format specifications

Open standard
3D coordinates supported
Lossless (no quality loss)
No attributes
Output: 1 file
Well-Known Text (OGC Simple Features). One geometry per line, human-readable. Direct INSERT into PostGIS / Spatialite.

Wie gebruik WKT-kaarte

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Databasisse (PostGIS)

Geometry is pasted into SQL directly through ST_GeomFromText — with no converters and no intermediate files.

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Programmering

Convenient material for tests and debugging: the shape is visible to the eye right in the source.

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GIS-ontleding

Quick exchange of geometry between GIS tools, all of which understand WKT.

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Stelselintegrasie

Passing coordinates to an adjacent system that accepts plain text rather than GIS format files.

Hoe om WKT uit te voer

Kies gebied

Teken 'n reghoek of veelhoek op die interaktiewe kaart by osm2cdr.ru

Kies WKT

Kies WKT (Well-Known Text) uit die lys van 127 beskikbare uitvoerformate

Uitvoer

Klik op Uitvoer en ontvang jou .wkt-lêer binne 1-5 minute

Aflaai

Laai die gereede WKT-lêer af en open dit in PostGIS

Hoe om dit ná uitvoer te open

PostGIS — paste the lines as they are: INSERT ... VALUES (ST_GeomFromText('POLYGON((...))', 4326)); the SRID must be specified.
Python — from shapely import wkt, then wkt.loads(line) line by line, skipping the lines that begin with two hyphens.
QGIS — the QuickWKT plugin pastes geometry from the clipboard onto a temporary layer; for a full-fledged layer it is easier to download GeoJSON right away.
Tables — WKT is understood by CSV import in QGIS: "Add Delimited Text Layer", with geometry from the WKT field.
Checking — ST_IsValid in PostGIS or shapely.is_valid: self-intersections after simplification do happen, and it is better to learn about them before loading into a database.