WKT (Well-Known Text) ialah perwakilan teks objek geometri mengikut standard OGC.

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WKT (Well-Known Text)

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.wkt · text/plain

WKT ialah format perwakilan teks untuk geometri, digunakan dalam pangkalan data (PostGIS, SpatiaLite) dan aplikasi GIS. Mudah dan senang disepadukan.

Eksport WKT sekarang ✨ Beta Terbuka — percuma, tanpa had

Ciri Utama

✓Format teks

✓Standard OGC

✓Penyepaduan DB yang mudah

✓Semua jenis geometri disokong

Mengenai Format 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.

Program yang Membuka Fail WKT

Program dan aplikasi berikut boleh membuka, menyunting, dan bekerja dengan fail WKT (Well-Known Text) (.wkt) yang dieksport daripada 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.

Siapa yang Menggunakan Peta WKT

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Pangkalan data (PostGIS)

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

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Pengaturcaraan

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

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Analisis GIS

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

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Penyepaduan sistem

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

Cara Mengeksport WKT

Pilih kawasan

Lukis segi empat atau poligon pada peta interaktif di osm2cdr.ru

Pilih WKT

Pilih WKT (Well-Known Text) daripada senarai 127 format eksport yang tersedia

Eksport

Klik Eksport dan terima fail .wkt anda dalam 1-5 minit

Muat turun

Muat turun fail WKT yang siap dan buka dalam PostGIS

Cara Membuka Selepas Eksport

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.