GIS and Mapping Tools

Geo Distance Calculator

Calculate great-circle distance between two latitude/longitude points.

Bearing Calculator

Calculate initial bearings between two geographic points.

Coordinate Format Converter

Convert coordinates between decimal degrees and DMS formats.

Geographic Midpoint Calculator

Compute midpoint coordinate between two points on Earth.

Polygon Area Calculator

Estimate polygon area and perimeter from latitude/longitude vertex list.

UTM Zone Finder

Find UTM zone number and hemisphere from latitude and longitude.

Geohash Tool

Encode lat/lon into geohash or decode geohash to approximate coordinate.

Map Scale Calculator

Calculate map ratio from map and ground distance or reverse-calculate ground distance.

Elevation Grade Calculator

Calculate grade percentage and slope angle from elevations and horizontal distance.

Destination Point Calculator

Compute destination coordinates from start point, bearing, and travel distance.

Survey Traverse Closure Calculator

Compute traverse closure error and relative precision from distance-bearing legs.

Coordinate Transformation Helper

Apply translation, rotation, and scale transformations between local and global coordinate frames.

Traverse Adjustment Bowditch

Adjust traverse latitude/departure values by Bowditch rule and compute corrected coordinates.

Contour Interval Volume Estimator

Estimate volume from contour elevation-area rows using end-area method.

Line of Sight Visibility Tool

Check theoretical line-of-sight visibility from heights and path length with curvature/refraction.

Solar Shadow Azimuth Calculator

Estimate solar azimuth/altitude and shadow direction/length from date and solar time.

Bearing Distance Resection Helper

Estimate unknown point coordinates from bearings observed to two known control points.