WKT (Well-Known Text) je textová reprezentace geometrických objektů podle standardu OGC.

📝

WKT (Well-Known Text)

Open Beta

.wkt · text/plain

WKT je textová reprezentace geometrií, používaná v databázích (PostGIS, SpatiaLite) a aplikacích GIS. Jednoduchá a snadno integrovatelná.

Exportovat WKT hned ✨ Otevřená beta — zdarma, bez omezení

Klíčové vlastnosti

✓Textový formát

✓Standard OGC

✓Snadná integrace do databáze

✓Podpora všech typů geometrie

O formátu 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.

Jaký program otevírá soubory WKT

Následující programy a aplikace dokážou otevřít, upravit a zpracovat soubory WKT (Well-Known Text) (.wkt) exportované z 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 používá mapy WKT

🏗

Databáze (PostGIS)

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

💻

Programování

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

📊

Analýza GIS

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

🎨

Integrace systémů

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

Jak exportovat WKT

Vyberte oblast

Nakreslete obdélník nebo polygon na interaktivní mapě na osm2cdr.ru

Zvolte WKT

Vyberte WKT (Well-Known Text) ze seznamu 127 dostupných exportních formátů

Export

Klikněte na Exportovat a obdržíte soubor .wkt během 1–5 minut

Stáhnout

Stáhněte si hotový soubor WKT a otevřete jej v PostGIS

Jak soubor otevřít po exportu

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.