Flow of Preparation of Irrigation Area Map

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Flow of Preparation of Irrigation Area Map

The flow of the preparation of the irrigation area map begins with an inventory of the data owned, including the Paddy Land Map, CSRT, Network and Building Scheme, As-Built Drawing and Design Situation Map. Through the process of delineation, field survey and analysis, it is hoped that a Map of Standard, Potential and Functional Irrigation Areas will be produced.




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SPATIAL DATA EDITING

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Data Editing

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 Data Editing Swipe Feature Shifting the feature is done if there is a feature whose placement does not match the actual conditions in the satellite image. The feature shift can be done if the entire feature will be shifted entirely. 1. Enter into editing mode by right-clicking on the layer (Irrigation Area or Irrigation Channel) Edit Features Start Editing. 2. In the Editor toolbar click Edit Tool click feature and drag to the actual location in the satellite image. 3. If the editing process is complete in the Editor toolbar click Editor Save Edits Stop Editing Edit Vertices Edit Feature is used to fix vectors, both lines and polygons. Basically, editing vertices is done by pulling the vertices in a shp. So when this tool is used, the nodes that have been created during digitization will reappear and can be drawn according to the reference (satellite image). These node points can be added as needed. 1. Enter into editing mode by right-clicking on the layer (Irrigation Area...
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Coordinate System and Map Projection

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Coordinate System and Map Projection Map as input data, information representation model and data analysis result model is an important part of GIS. A map is a picture of part or all of the earth's surface, both above and below the surface and presented on a flat plane at a certain scale and projection (mathematically). There are 2 coordinate systems that are generally used in the preparation of geographic information systems, namely the geographic coordinate system and the Universal Transverse Mercator (UTM) coordinate system. Geographic Coordinate System The Geographic Coordinate System consists of latitude that divides evenly from the equator towards the poles and longitude that divides the equator evenly. Figure 3 above shows the coordinates of Moscow City (yellow spot) in DMS and DD coordinates. Decimal Degrees (DD) is related to Degrees/Minutes/Seconds (DMS), by changing the minutes and seconds values into 'decimal degree values'. Decimal Degrees are generally more wi...
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