Unable to create image from gpx: Not implemented: HTMLCanvasElement.prototype.getContext (without installing the canvas npm package)

[ebtfr]

Hi,
I'm trying to generate an image from a GPX file.
I made a clean (I think !) installation of Node, Canvas and dependencies but still get the same error.

georender -i vesuvio.gpx -o vesuvio.png
Georender - Render GPS data as image
Rendering...
width: 500
height: 500
input files: [ 'vesuvio.gpx' ]
output file: vesuvio.png
Import GPX: vesuvio.gpx
Error: Not implemented: HTMLCanvasElement.prototype.getContext (without installing the canvas npm package)
at module.exports (/tools/georender-main/node_modules/jsdom/lib/jsdom/browser/not-implemented.js:9:17)
at HTMLCanvasElementImpl.getContext (/tools/georender-main/node_modules/jsdom/lib/jsdom/living/nodes/HTMLCanvasElement-impl.js:42:5)
at HTMLCanvasElement.getContext (/georender-main/node_modules/jsdom/lib/jsdom/living/generated/HTMLCanvasElement.js:131:58)
at createCanvasContext2D (file:///tools/georender-main/node_modules/ol/dom.js:34:12)
at CanvasTileLayerRenderer.useContainer (file:///tools/georender-main/node_modules/ol/renderer/canvas/Layer.js:190:17)
at CanvasTileLayerRenderer.renderFrame (file:///tools/georender-main/node_modules/ol/renderer/canvas/TileLayer.js:385:10)
at TileLayer.render (file:///tools/georender-main/node_modules/ol/layer/Layer.js:372:28)
at CompositeMapRenderer.renderFrame (file:///tools/georender-main/node_modules/ol/renderer/Composite.js:128:29)
at Map.renderFrame_ (file:///georender-main/node_modules/ol/Map.js:1584:20)
at Map.animationDelay_ (file:///tools/georender-main/node_modules/ol/Map.js:1423:10) undefined
Cannot read properties of null (reading 'canvas')

System: Ubuntu 24.04.2 LTS (Noble Numbat)
Node : node --version > v20.18.3
npm -v > 10.9.2

Downloaded Georender from https://github.com/loskoderos/georender today, 21 Feb, 2025

I don't know what is missing or wrong, can you help ?

[cepa]

Hello, it looks like the jsdom dependency is in a wrong version. That said, I just have tried to refresh entier node_modules and it seems some packages like node-canvas were changed so much the npm install fails.

Docker works though.
If you need it urgently you can try to use docker to build georender with working versions of node and dependencies:

Build the container
docker build -t georender .

Run georender in the container:
docker run -v ./:/local georender -i /local/samples/vesuvio.gpx -o /local/out.png

[Lucas-C]

Thank you, this helped me 👍