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I am trying to recreate a situation where each cell from a raster dataset has a black border as seen in this image. Any ideas?

illustration of raster with visible cell boundaries

Dayne
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    It depends on the software. For instance, in Mathematica you simply specify this as an option to the command to display the raster, whereas in ESRI software you will need a work-around. Which software are you using? – whuber Nov 08 '13 at 15:52
  • Thanks for the Reply im using ESRI ArcInfo 9.3 as well as 10 – Dayne Nov 10 '13 at 11:50
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    Thanks for the help chaps In South Africa we have a saying - "As jy dom is moet jy kak". Translated - "If your being stupid your going to battle". I was using fishnet but I entered the wrong cell size. I eventually realised my mistake and have now got it right. Thanks again – Dayne Nov 10 '13 at 12:12

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Probably the simplest way to achieve this is to create a fishnet (available in most GIS packages) and overlay this on your raster. Be sure to align the fishnet to the raster cells by checking the raster's meta data.

MappaGnosis
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    After creating the fishnet, you'll want to clip it to the data area of the raster (so that the fishnet doesn't extend into the white areas of your sample image). You will need a vector of the data area's outline to do the clip, and to illustrate the data area with a thicker border (as shown in your image). –  Nov 08 '13 at 13:58
  • Hi There - I have trie fishnet but i cant seem to get it right? Any additional advice here? – Dayne Nov 10 '13 at 11:52
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Processing Toolbox → Vector Creation → Raster pixels to polygons

Bruce Xiaolong Liu
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Another option, again using QGIS:

Generate a vector grid based on the raster, using the menu:

Vector/Research Tools/Vector grid

From there you can assign the properties of the grid to match the raster of your choice.

To clip the created grid to your raster use the menu item:

Vector/Geoprocessing Tools/Clip

This option avoids cells being joined together, as described in my other answer. However, this method is longer!

MikeRSpencer
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With QGIS it is possible to set up a Contours display in the rasters symbology settings, but building such contours is a rather slow procedure.

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Comrade Che
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Using QGIS you can convert the raster to polygon using the menu:

Raster/Conversion/Polygonize

This will create a fishnet as described by MappaGnosis.

One potential drawback I find is that the tool rounds to integer values, so if cells have the same number (after rounding) they're joined together.

MikeRSpencer
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