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Thread: Create study area map using Imhof style

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  1. #1
    Administrator waldronate's Avatar
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    You need to filter the image to your final resolution before doing the hillshade. Calculate your desired image resolution and the area that you wish to cover and upscale to that (if you want a 1000 km wide area rendered into roughly a 1000 pixel image then you'll need 1000000m/1000px = 1000m/px resolution. There looks to be a whole lot of aliasing in the first image and the second image looks to be mostly ambient occlusion / texture shading as an alpha channel.

    Start by reading http://wiki.gis.com/wiki/index.php/S...20locations%29 (especially the parts on Resolution Bumping) and then move to reading http://www.shadedrelief.com/bumping/bumping.html for good information. Heck, just read http://www.shadedrelief.com/articles.html and you'll know more than you ever wanted to know.

    Edit: maybe that second one is just a hill shade with the midtones (grays) set as transparent. Either way, reducing your resolution is the key to getting what you're after.
    Last edited by waldronate; 05-03-2021 at 09:18 PM.

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