![]() ![]() Use the Magic Wand Selection Tool to select the area you just painted. Make sure you set the brush to have a hardness of 100%.Ģ. Make a new layer, and using a wonderful bright colour, paint over the area you want to calculate the size of. This gives us 12.344 pixels per meter and if we square it we get 152.374px per square meter. So from this we can work out that there’s 246.88 pixels in 20 meters. In the ruler tool options (top of the screen usually), make sure “Use Measurement Scale” is unticked. Use the Ruler Tool in Photoshop (hidden under the eyedropper tool) and select the distance for your scale.ģ. If you’ve got a scale marker on your map, use that, otherwise you’ll need to measure a distance that you know, in this case I used a basketball court (marked as 20mx33m).Ģ. ![]() In this guide I’m using Photoshop CS5 for Mac, most of the concepts will be similar for the other versions.įirst up: Scan your map and get it into Photoshop Working out the Scaleġ. ![]() Here’s a quick guide I wrote on how to use Photoshop to easily measure an area on a Map using Photoshop. ![]()
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