Home » Raster Tools » Page 2

# Raster Tools

## How To: Rasterization and Vectorization Conversion

Rasterization converts vectors into rasters. While vectorization transforms rasters in vectors. We explain how to go from one data model to the other.

## Least Cost Path Analysis in GIS

The least cost path finds the most cost-effective path, from a start point to a destination, making it a useful tool for linear routing.

## What is an Aspect Map?

In the mountains, the terrain slopes are in all directions – east, west, north and south-facing. The compass direction that the slope faces is slope aspect.

## Inverse Distance Weighting (IDW) Interpolation

Inverse Distance Weighting (IDW) interpolation estimates unknown values with specifying search distance, closest points, power setting & barriers.

## What Is Flow Direction in GIS?

Flow direction calculates the direction water will flow in its eight adjacent cells using slope from neighboring cells (in a raster grid cell)

## Raster Resampling for Discrete and Continuous Data

For raster resampling in GIS, you can use bilinear and cubic convolution for continuous data as well as nearest neighbor and majority for discrete data.

## How to Fill NoData for Raster Data

SAGA GIS has a quick and dirty tool to fill NoData holes with raster data. We show you how to close gaps in DEMs or any raster data with holes in it.

## What is Map Algebra? [Raster Math]

Map algebra is a cell-by-cell combination of stacked raster grids. It uses math-like functions with arithmetic, statistics and trigonometry operators.

## Raster Clip in GIS

Learn how to clip rasters in ArGIS using the raster clip tool in ArcToolbox as well as the clip button as part of the Raster Functions.