WKT (Well-Known Text) je besedilni prikaz geometrijskih objektov po standardu OGC.

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WKT (Well-Known Text)

Open Beta

.wkt · text/plain

WKT je format besedilnega prikaza geometrij, ki se uporablja v zbirkah podatkov (PostGIS, SpatiaLite) in aplikacijah GIS. Preprost in enostaven za vključitev.

Izvozi WKT zdaj ✨ Odprta beta — brezplačno, brez omejitev

Ključne značilnosti

✓Besedilni format

✓Standard OGC

✓Enostavna vključitev v zbirko podatkov

✓Podprte vse vrste geometrij

O formatu WKT

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.

Kateri program odpre datoteke WKT

Naslednji programi in aplikacije lahko odprejo, urejajo in delajo z datotekami WKT (Well-Known Text) (.wkt), izvoženimi iz OSM2CDR:

💻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.

Kdo uporablja zemljevide WKT

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Zbirke podatkov (PostGIS)

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

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Programiranje

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

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Analiza GIS

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

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Integracija sistemov

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

Kako izvoziti WKT

Izberite območje

Narišite pravokotnik ali poligon na interaktivnem zemljevidu na osm2cdr.ru

Izberite WKT

Izberite WKT (Well-Known Text) s seznama 127 razpoložljivih izvoznih formatov

Izvoz

Kliknite Izvozi in prejmite datoteko .wkt v 1–5 minutah

Prenos

Prenesite pripravljeno datoteko WKT in jo odprite v programu PostGIS

Kako odpreti po izvozu

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.