WKT (Well-Known Text)
Open BetaWKT, ज्यामितियों के लिए एक टेक्स्ट प्रतिनिधित्व फ़ॉर्मैट है, जिसका उपयोग डेटाबेस (PostGIS, SpatiaLite) और GIS अनुप्रयोगों में किया जाता है। सरल और एकीकृत करने में आसान।
मुख्य विशेषताएँ
WKT प्रारूप के बारे में
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 फ़ाइलें कौन सा प्रोग्राम खोलता है
निम्नलिखित प्रोग्राम और अनुप्रयोग OSM2CDR से निर्यात की गई WKT (Well-Known Text) (.wkt) फ़ाइलों को खोल, संपादित और उनके साथ काम कर सकते हैं:
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 मानचित्रों का उपयोग कौन करता है
WKT कैसे निर्यात करें
निर्यात के बाद कैसे खोलें
- 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.
WKT में लोकप्रिय मानचित्र
WKT (Well-Known Text) मानचित्र निर्यात प्राप्त करें
OpenStreetMap से पेशेवर WKT मानचित्र डाउनलोड करें. तत्काल जनरेशन, कोई भी क्षेत्र.
अक्सर पूछे जाने वाले प्रश्न
अन्य प्रारूपों से तुलना करें
संबंधित प्रारूप
अक्सर एक साथ निर्यात किए जाते हैं
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