Substracting raster values from 2 rasters with different cell sizes

How do you subtract two raster layers in Arcgis?

Procedure

1. In ArcMap, navigate to ArcToolbox > Spatial Analyst Tools > Map Algebra > Raster Calculator.
2. In the Raster Calculator window, double-click one of the rasters to be analysed, click the minus sign (-), and double-click the second raster.
3. Specify the name and location for the output raster.
4. Click OK.

What is raster calculation?

Raster Calculator is designed to execute a single-line algebraic expression using multiple tools and operators. When multiple tools or operators are used in one expression, the performance of this equation will generally be faster than executing each of the operators or tools individually.

How do you subtract two subsets?

Quote from video: If you take set a basically all it is a minus b it's all the elements in a minus the elements in b.

How do you subtract two layers?

To subtract a layer from a selection, press Ctrl Alt (Mac: Command Option) and click on the layer’s thumbnail. To intersect the selection press Ctrl Alt Shift (Mac: Command Option Shift) and click on the layer’s thumbnail.

What is the use of raster calculator?

The Raster Calculator tool allows you to create and execute a Map Algebra expression that will output a raster. Use the Layers and variables list to select the datasets and variables to use in the expression.

How to do raster calculation in ArcGIS?

To access the Raster Calculator, select it from the Spatial Analyst toolbar menu. In the dialog box, you can enter Map Algebra in the expression box. The available rasters will be displayed in the Layers list.
 

What happens when you scale a raster image?

When scaling a raster graphics image, a new image with a higher or lower number of pixels must be generated. In the case of decreasing the pixel number (scaling down) this usually results in a visible quality loss.

How do you trim a raster?

Here are the steps to clip rasters using the Image Analysis toolbar in ArcGIS:

1. Enable Image Analysis Toolbar. Enable the Image Analysis Toolbar (Windows > Image Analysis).
2. Select Raster to Clip. In the image analysis toolbar, select the raster that you want to clip.
3. Select Polygon Boundary to Clip To.
4. Click Clip Icon.

How do you subtract using stacking?

Instead of writing the numbers side by side… Place the numbers so they are stacked — one number on top and one number on the bottom. With a stacked subtraction expression, the larger number is always written on top.

How do you delete a part of a raster in ArcGIS?

Using the raster painting erase tools

1. Click an erase tool on the Raster Painting toolbar. Click the Erase tool .
2. Drag the tool over the raster cells to erase them. When using the Magic Erase tool, connected cells are erased, although any connected cells that extended beyond the dragged box are not erased.