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WKT (Well-Known Text)

Open Beta

.wkt · text/plain

WKT는 지오메트리를 위한 텍스트 표현 형식으로, 데이터베이스(PostGIS, SpatiaLite)와 GIS 애플리케이션에서 사용됩니다. 단순하고 통합하기 쉽습니다.

지금 WKT 내보내기 ✨ 오픈 베타 — 무료, 제한 없음

주요 기능

✓텍스트 형식

✓OGC 표준

✓간편한 DB 통합

✓모든 지오메트리 유형 지원

WKT 형식 소개

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.

WKT 파일을 여는 프로그램

다음 프로그램과 애플리케이션으로 OSM2CDR에서 내보낸 WKT (Well-Known Text)(.wkt) 파일을 열고 편집하고 작업할 수 있습니다:

💻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.

WKT 지도 사용자

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데이터베이스(PostGIS)

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

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프로그래밍

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

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GIS 분석

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

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시스템 통합

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

WKT 내보내기 방법

영역 선택

osm2cdr.ru의 인터랙티브 지도에서 사각형 또는 폴리곤을 그리세요

WKT 선택

사용 가능한 127가지 내보내기 형식 목록에서 WKT (Well-Known Text)을(를) 선택하세요

내보내기

내보내기를 클릭하면 1~5분 안에 .wkt 파일을 받습니다

다운로드

완성된 WKT 파일을 다운로드하여 PostGIS에서 여세요

내보낸 뒤 여는 방법

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.