Identify lines in a raster layer

OrRubinstein — Tue, 25 Jan 2022 13:14:20 GMT

I have a land cover raster layer, and i want to idenify linear occurrences in the layer and convert them to line or polyline features.

I tried to use "Rsater to Polyline" tool, but the output wasnt usefull.

I want to achive something like this:

Is there a tool or algorithm that I can use for this?

Thanks!

Re: Identify lines in a raster layer

DanPatterson — Tue, 25 Jan 2022 13:24:52 GMT

Region group and Nibble come to mind.

Nibble allows you get rid of those speckles or small separated but aggregated areas

A neighborhood filter can also remove some small speckles but you have to be careful of the neighborhood size given the thinness of your roads

Regiongroup to form identified continous zones of cells of a particular value or values