Convert GML Polygon to Line Online

Extract GML polygon boundary rings as LineString features in your browser.

Powered by GDAL WebAssembly and Turf.js for accurate geometry conversion.

GML line output is best for OGC-standard interoperability with enterprise GIS systems and WFS data-exchange pipelines.

→ Full guide: Polygon to Line Tools

Convert GML

GML to GeoJSON
GML to KML
GML to Shapefile
GML to GeoPackage

Visualization Tools

GML Viewer
Visualize Any Format
GeoJSON Viewer
Shapefile Viewer
KML Viewer
CSV Viewer

Grid Tools

Grid Generator

Bounding Box Tools

GML Bounding Box
GeoJSON Bounding Box
Shapefile Bounding Box
KML Bounding Box
GeoPackage Bounding Box

Measurement Tools

Measure GML Features
Measure GeoJSON Features
Measure Shapefile Features
Measure KML Features
Measure GeoPackage Features

Buffer Tools

Buffer GML
Buffer GeoJSON
Buffer Shapefile
Buffer KML
Buffer GeoPackage

Dissolve Tools

Dissolve GML
Dissolve GeoJSON
Dissolve Shapefile
Dissolve KML
Dissolve GeoPackage

Centroid Tools

GML Centroid
GeoJSON Centroid
Shapefile Centroid
KML Centroid
GeoPackage Centroid

Simplification Tools

Simplify GeoJSON
Simplify Shapefile
Simplify KML
Simplify GPX
Simplify GeoPackage

Data Inspection

Geospatial File Inspector
GeoJSON Inspector
Shapefile Inspector
GeoTIFF Inspector

Feature Selection Tools

Select GML Features
Select GeoJSON Features
Select Shapefile Features
Select KML Features
Select GeoPackage Features

Filter by Attribute Tools

Filter GML by Attribute
Filter GeoJSON by Attribute
Filter Shapefile by Attribute
Filter KML by Attribute
Filter GeoPackage by Attribute
Filter Any Vector Format

Convex Hull Tools

Convex Hull GML
Convex Hull GeoJSON
Convex Hull Shapefile
Convex Hull KML
Convex Hull GeoPackage

More Polygon to Line Tools

GeoJSON Polygon to Line
Shapefile Polygon to Line
KML Polygon to Line
GeoPackage Polygon to Line

Line to Polygon Tools

GML Line to Polygon
GeoJSON Line to Polygon
Shapefile Line to Polygon
KML Line to Polygon
GeoPackage Line to Polygon

Explode to Points Tools

Explode GML to Points
Explode GeoJSON to Points
Explode Shapefile to Points
Explode KML to Points
Explode GeoPackage to Points

Flatten Multi-Geometry Tools

Flatten GML
Flatten GeoJSON
Flatten Shapefile
Flatten KML
Flatten GeoPackage

Combine Features Tools

Combine GML Features
Combine GeoJSON Features
Combine Shapefile Features
Combine KML Features
Combine GeoPackage Features

Spatial Operations

Clip GeoJSON
Clip Shapefile
Clip Vector Data
SQL Query
Explode Multi-Geometries
Fix Geometries

Raster Operations

Crop GeoTIFF
Crop Raster
Resize GeoTIFF
Resample Raster
Extract Band
Reproject GeoTIFF

Rasterization Tools

Rasterize GML
Rasterize GeoJSON
Rasterize Shapefile
Rasterize KML
Rasterize GPX
Rasterize GeoPackage

Reprojection Tools

Reproject GeoTIFF
Reproject Shapefile
Reproject Vector
Assign CRS

Coordinate Conversion Tools

Lat/Long to DMS

Decimal to degrees/minutes/seconds

DMS to Lat/Long

Degrees/minutes/seconds to decimal

Lat/Long to UTM

Geographic to UTM coordinates

UTM to Lat/Long

UTM to geographic coordinates