The document outlines a series of steps for conducting raster analysis using various spatial data layers, including settlement, hospital, elevation, and land use. It details the process of deriving distance measures and slope analysis, followed by reclassification of these layers using a specified method. Finally, it discusses the application of weighted overlays to combine the reclassified data into a single result.

1. RASTER ANALYSIS
Source
Add data – D drive – new folder 3 – practical data – spatial (vector) – settlement, hospital, elevation and
land use – add
Settlement Hospital
Elevation landuse
Step 1. Derive the data
a. Distance to the settlement
Arc tool box – spatial analysis tool – distance
Euclidean distance
i/p – settlement o/p – (create a new folder) disttosettle
Environment settings – processing extent – extent – same as layer elevation – ok

2. b. Distance to the hospital
Euclidean distance
i/p – hospital o/p – disttohosp
Environment settings – processing extent – extent – same as layer elevation – ok
c. Slope of elevation
Arc tool box – spatial analyst tool – surface slope
i/p – elevation o/p – slope
Environment – output coordinate – o/p coordinate system – as specified below
Select – projected coordinate – UTM – WGS 1984 – northern hemisphere – 43N – apply – ok

3. Step 2. Reclassification
Arc tool box – spatial analyst tool – reclasses
a. Reclassify (settlement)
i/p – disttosettle reclass field - value
Classify – class -10 – method – equal interval - ok – click reverse new value (we have to modify)
o/p – reclasssettle
b. Reclassify (hospital)
i/p – disttohosp reclass field - value
Classify – class - 10 – method – equal interval - ok – (no modify)
o/p – reclasshosp

4. c. Reclassify (slope)
i/p – slope reclass field - value
Classify – class - 10 – method – equal interval - ok – click reverse new value (we have to modify)
o/p – reclassslope
d. Reclassify (landuse)
i/p – landuse
reclass field – LU type – type all the given ranks, others are deleted
o/p – reclasslu

5. Step 3. Weighted and overlay
Spatial analyst tool – map algebra – raster calculator
Reclasssettle*0.5+reclasslu*0.25+reclasshosp*0.125+reclass*0.125 – ok
Step 4. Result