MapBench tool category
Map Files Map Tools
KML, GeoJSON, GPX and CSV. This hub groups 63 tools that answer related geographic questions while keeping the underlying method, data source and limitations visible.
Start with these tools
Choose the tool that matches the question rather than the one with the most familiar name. Related tools can use different geographic models and legitimately return different answers.
GeoJSON Validator
Check GeoJSON syntax and core top-level structure locally in your browser.
Open tool →GPX to CSV Converter
Convert GPX track, route and waypoint coordinates to a downloadable CSV file.
Open tool →KML Viewer
Open and view KML or KMZ files on an interactive map.
Open tool →GPX Viewer
Open GPX tracks and waypoints on an interactive map.
Open tool →GeoJSON Viewer
View GeoJSON features on an interactive map.
Open tool →CSV to Map
Plot latitude/longitude rows from a CSV on the map.
Open tool →GPX Route Stats
Open a GPX file and review track distance and path on the map.
Open tool →KML Path Length
Measure path length from a KML/KMZ file on the map.
Open tool →CSV Lat/Lng Validator
Check a coordinate CSV before mapping — catch bad lat/lng rows.
Open tool →Heatmap from Points
Plot many points from a CSV to see density patterns on the map.
Open tool →Cluster Map from Points
Group nearby CSV points visually on an interactive map.
Open tool →WKT / GeoJSON Helper
View and work with geometry text alongside interactive map plotting.
Open tool →How to use this category well
Parsing uses browser-native readers (FileReader, DOMParser, JSON.parse); files never leave the device. Format fidelity notes accompany every export button.
- Keep the original file even after converting: GPX→GeoJSON drops timestamps' context, KML→GeoJSON drops styling, and every pipeline has a lossy edge. Originals are cheap; re-acquisition is not.
- Validate before trusting exports from unfamiliar tools — open them in a local viewer and check feature counts, bounding boxes and a few property rows. A wrong-axis or swapped-coordinate export is far easier to catch on a map than in a spreadsheet.
- For big CSVs, fix the coordinate columns first and map a sample before mapping everything: auto-detection is good but not magical, and one swapped column renders a beautiful map of the wrong ocean.
The quiet discipline of geographic data hygiene
Teams that handle geographic files well share habits that have nothing to do with software: originals are sacred, conversions are named acts with stated losses, filenames carry provenance, and every incoming file gets thirty seconds of inspection — counts, bounding box, three random rows — before it touches anything downstream. These habits convert the classic failure modes (a KMZ mistaken for KML, a swapped CSV column rendering the wrong ocean, GPZ elevation spikes blamed on the tool) from disasters into logged non-events. The local-first design reinforces them: because nothing uploads, inspection costs nothing and confidentiality survives by architecture rather than promise. In that sense a browser workbench is not a lesser GIS; it is the hygiene layer every serious pipeline needs at the door, catching the messy world before it reaches the clean interior.
- Adopt a house rule: no file enters analysis without a printed validation line.
- Filename schema 'YYYY-MM-DD_source_format' — provenance you'll actually read later.
- Keep a 'losses' note with every conversion; audits become trivial when losses are named.
Key terms
GeoJSON
JSON geographic format; the web-mapping native dialect.
KML
XML format from the Google Earth era, with styling and ExtendedData.
GPX
GPS exchange format: waypoints, tracks, routes, elevation, timestamps.
Bounding box
The minimal rectangle enclosing a dataset; the instant sanity check.
Related guides & original research
KML vs. GeoJSON vs. GPX: Choosing the Right Map File Format
Compare the strengths, losses and best uses of the most common geographic file formats.
Understanding GPS Coordinates: Formats, Datums and Precision
Useful when file coordinates appear swapped, over-precise or tied to an unexpected datum.
Map Projections Explained
Useful context when imported spatial files use different coordinate systems or projections.
When to verify with an official source
MapBench is designed for analysis, learning and planning. If the result affects a legal boundary, surveying, emergency response, engineering, regulated eligibility, official statistics or a financial commitment, verify the underlying information with the responsible authority or qualified professional.