Geojson on ikml.com

Google My Maps Export to GeoJSON and Which Styles Survive

Sun, 25 Oct 2026 00:00:00 +0000

Google My Maps is where a lot of maps start: a school trip, a list of venues, a delivery route, built by someone who never opened a GIS. When the map needs to go somewhere else, My Maps exports it as KML or KMZ. Each layer becomes a folder, the colour and icon of every pin becomes a pair of styles, and the table of extra fields becomes ExtendedData.

Then someone converts that to GeoJSON for a website, and the map comes out grey.

GPS Tracks With Timestamps and What Happens to Them in GeoJSON

Sun, 25 Oct 2026 00:00:00 +0000

A GPS track in KML is more than a line. Google’s gx:Track element stores a time for every position, so a ride, a run or a vehicle’s day can be replayed, measured for speed and matched against other data by time. Fitness devices and tracking apps also attach values per point, such as heart rate or speed, as SimpleArrayData.

A plain conversion to GeoJSON turns the track into a LineString, and the times are gone. The line is still there, so it looks fine on a map, until someone asks how long a stretch took.

iKML 0.1 Shows What Is Inside a KML, KMZ or GeoJSON File Before You Import It

Sun, 25 Oct 2026 00:00:00 +0000

Somebody sends you a map file. A KMZ from a drone pilot, a KML export from Google My Maps, a GeoJSON layer from a city’s open data portal. You open it in QGIS, or upload it to a web map, and something is off: a few points are missing, a polygon doesn’t draw, the icons are grey squares, half the attribute columns are gone. Nothing told you why.

iKML 0.1 tells you first. It opens KML, KMZ and GeoJSON files, shows what’s inside them, flags what’s broken, explains exactly what a conversion to another format will lose, and writes a cleaned copy with a list of every change.

What KML, KMZ and GeoJSON Are and Why Map Files Lose Data on Import

Sun, 25 Oct 2026 00:00:00 +0000

Most map data that moves between people moves in one of three formats. They look interchangeable, and every tool converts between them. They aren’t interchangeable, which is why so much goes missing on the way.

KML: Built for an Earth Viewer

KML, the Keyhole Markup Language, was made for the program that became Google Earth. Keyhole, the company, was bought by Google in 2004. Google later handed the format to the Open Geospatial Consortium, and KML 2.2 became an OGC standard in 2008.