Raster is a data format consisting of regular grids of values, usually stored in an image-like format.

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Polygon shapefile to Raster with Mask and Extent

I have a polygon shapefile (Vesijärvi lake). The lake has many islands, bays and inlets. When I look at the attribute table, there are actually two adjacent features: Northern lake and southern lake. ...
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1answer
48 views

Calculate the coordinates upper right corner from the center [closed]

How do i calculate the coordinates upper right corner from the coordinates of center? if there's an example that would be really helpful.
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2answers
116 views

Counting raster points within boundaries in another layer?

I know this question is similar to some out there, but I have tried all the 'solutions' and none of them are working for me. I am using the latest version of Qgis. I have a raster layer with ...
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1answer
296 views

Raster produced by Con expression not saving

I cannot get a Con expression to work. Or, if it is working, I cannot get the raster produced by the Con expression to save. I have two rasters and I want the positive difference between the two, and ...
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1answer
73 views

HOW to build a raster file from polygons showing subsoil layers classification?

I'm trying to build a raster map showing different subsoil features for a further analysis in ModFlow. I wonder how I can build a raster which shows different subsoil features?
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0answers
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what is the math behind rasterization? Doubt [duplicate]

In Figure 4 you can see how the overlap is not complete (marked with circles). What I would like to know which algorithm that QGIS uses the rasterization? What is your standard? Is there a percentage ...
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1answer
26 views

Setting Pixels Band Values

I have a single band RASTER of an area, in which I want to create 360 bands and then assign those bands values from a table. Is there a process for doing this?
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1answer
428 views

how to make grid cells by point data [closed]

I have a csv data. the X, and Y columns show bottom left corner of each grid. It is supposed to show as grid square, but it shows points. what is the problem? and is there any way I can make cell ...
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0answers
17 views

R raster package split image into multiples [on hold]

I have an image as below. It is 2579*2388 pixels. Lets assume that it's bottom left corner is at 0,0. From that image I want to create multiple images as follows and save them in the working folder. ...
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3answers
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Delivering map tiles in real-time without caching? [closed]

I am wondering how useful would you find to have a way to deliver map tiles quickly over the web without worrying about caching or seeding them? With raster map engines we know that this is a ...