Disclaimer
Introduction
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1 Getting started
| 1.1 | Open ArcMap, select a new empty map. You will now save the map file. Click on File>Save as… in the menu bar. Browse to the folder C:\ CLUP_EXERCISE_DATA\06_Workfolder \ and type ‘Erosion_v1.mxd’. Click Save/OK. |
| 1.2 | Click on the add data button  and browse to C:\CLUP_EXERCISE_DATA\00_BM and select the files:
barangays_bndry Lake municipal_bndry Rivers Roads Click OK. Click on the add data button EN04_Erosn Click OK. (See image below.)
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2 Making selection by attributes
In this example we assume that areas that are affected by moderate and severe erosion are not suitable for future urban development.
We have to make a new layer that contains the areas with no moderate and severe erosion.
The erosion hazard layer contains “no apparent erosion, slight erosion, moderate erosion and severe erosion”. We will have to make a new layer that contains moderate and severe erosion
| 2.1 | Open the selection menu >selection by attribute |
| 2.2 | The layer that we are making our selection from is EN04_Erosn. In the operator window type "EROSN_TP" = 'Moderate erosion”. |
| 2.3 | Press the Apply button. |
| 2.4 | In the method column. Change to “Add to current selection”. Change the operator window to “EROSN_TP" = 'Severe erosion'
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| 2.5 | Press the Apply button. |
3 Create a new layer for the selected features
| 3.1 | In the layer menu right click on the erosionhazard layer, then> Selection >Create Layer From Selected Features. |
| 3.2 | Rename the newly created layer erosion hazard selection |
| 3.3 | Remove the EN04_Erosn layer |
4 Save the erosionhazardselection layer as a shapefile
To be able to use the layer containing the selected types of floodinghazards in another template, you have to save the layer as a shapefile.
| 4.1 | In the layer menu right click on the erosionhazardselection layer,then > Data> Export Data. |
| 4.2 | Chose “All features” in the Export field |
| 4.3 | Mark the “Use the same Coordinate system as this layer’s source data” bullet |
| 4.4 | In the row “specify output shapefile or feature class” save as C:\ \CLUP_EXERCISE_DATA\03_EN\erosionhazardselection
In the “Save as type”, chose shapefile |
| 4.5 | Press the save button |
| 4.6 | Press the Ok button |
| 4.7 | You will be given a question if you want to add the exported data to the map as a layer. Press [/b]No
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| Attachment | Size |
|---|---|
| 7.07.02 Erosion Tutorial (PDF) | 766.7 KB |