DELINEATION OF IRRIGATION AREA

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DELINEATION OF IRRIGATION AREA 

This chapter is intended to compile shp data on irrigation areas and irrigation networks, where participants are expected to be able to delineate satellite images. The resulting SHP includes irrigation areas (polygons), irrigation networks that include irrigation channels (lines) and irrigation buildings (points). Delineation of irrigation areas in this activity is carried out by digitizing on screen on satellite images or aerial photos using ArcMap. In this training, SPOT 6 and 7 satellite images have been provided with different resolutions and are expected to be used to make maps with a scale of 1:5,000.

Creating Shapefiles (shp)

Creating shp can be done using ArcCatalog or using ArcMap. For effectiveness, in this example the shp creation and processing is done using ArcMap. The purpose of making this SHP is to create a foundation in the depiction of irrigation area elements which are divided into point geometries (irrigation buildings), line (irrigation channels) and polygons (irrigation areas).
  1. Open the ArcMap application in the Windows Start Menu. Start ArcGIS ArcMap.
  2. If a dialog appears (ArcMap - Getting Started) it can be ignored by clicking Cancel.
  3. Click Catalog in the Standard toolbar a Side Menu appears which displays features similar to ArcCatalog.

   4. Before browsing the folder that will be used as a storage place for shp, first connect the destination        folder. The trick is to click Connect to Folder then browse to the desired Folder or 
        Drive (Example in the picture: H:/Exercise)
        ️click OK.


        5. Browse to the destination folder in the Connection Folder right click the folder
️           select New️Shapefile️Set the configuration of shp starting from the name, data type and coordinate           system. Make shapefiles until 3 shapefiles are created (irrigation areas, irrigation canals and                   irrigation buildings).
           a. The filename is defined as follows:
    • Standard Irrigation Areanamed with DIBaku_Prov/Kab/Kot_[region name]. Example: DI_Prov_DIYogyakarta.
    • Potential Irrigation Areanamed with DIPotensi_Prov/Kab/Kot_[region name]. Example: DIPotensi_Prov_DIYogyakarta.
    • Functional Irrigation Areanamed with DIFungsi_Prov/Kab/Kot_[region name]. Example: DIFungsi_Prov_DIYogyakarta.
    • Irrigation Channelnamed with Sal_Prov_ Prov/Kab/Kot_[region name]. Example: Sal_Prov_DIYogyakarta.
    • Building Irrigation named with bang_Prov_ Province/District/City_[name area]. Example: Bang_Prov_DIYogyakarta.
        b. File type: Irrigation Area (polygon),Irrigation Channel (polyline) and Irrigation Building                         (point).
         c. Coordinate System: Geographic Coordinate System drop down World select
             WGS 1984.
If the configuration settings have been done, click OK. Shp will be automatically added to the Table of Contents as a layer.

     6. The finished shp can be deleted or renamed as needed using the Catalog. Right-click on the shp to           be modified and select the features as needed.


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