Running into process out of memory on readRGB

Hi, I’m trying to convert a GeoTIFF to PNG, and I’m getting the error message “FATAL ERROR: v8::ArrayBuffer::New Allocation failed - process out of memory” when I call the readRGB function. I’m doing this on the back-end (Node-Server):

The size of the tiff-file is about 700 MB.

Here is a code-snippet:

const tiff = await geotiff.fromArrayBuffer(fileProm.buffer);

const image = await tiff.getImage();
const width = image.getWidth() as number;
const height = image.getHeight() as number;
const geoKeys = image.getGeoKeys();

console.log('height:', height);
console.log('width:', width);

const rgb = await image.readRGB();

console.log('rgb:', rgb);

console.log result for the size is:

height: 25576 width: 27035

I don’t get a result from the last console.log.

[Rskut]

I’m talking about the Image itself. Actually, it does not make sense to move tiff images around the map but yeah. My current solution is f. e. to move the image I have to calculate a new extent or to rotate I have to rotate the projection of the layer source etc. I would try that with the tile layer too. Thank you so far.

[constantinius]

I think the user would like to see the whole tiff

I’m sure that the user would like to see the whole TIFF file, but unless he has some very, very expansive hardware he will not be able to. Usual screen resolutions are something like 1920x1080, which is 2 million pixels, so around 0.3% of your image. What I’m trying to say is that it is not possible to visualize the whole image in a single pass.

I’m not sure of your use-case, but typically when you have such a large image it is adviseable to read the image piecewise, and use a mapping library to allow users to zoom and pan around in your image. OpenLayers recently has added support for geotiff.js and there are some examples there on how to use it: https://openlayers.org/en/latest/examples/cog-overviews.html

I’ll close this image now as it is unrelated to geotiff.js. Feel free to still ask questions here.