Data Identification

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Data Identification 

Data identification is intended to examine vectors from irrigation areas and irrigation canals that previously existed and had been entered into the geodatabase. Identification includes:
a. Coordinate System;
b. Vector Geometry Accuracy on Satellite Imagery;

Coordinate System

The coordinate system according to the One Map Policy standard is the Geographic coordinate system using the 1984 WGS ellipsoid reference. If the shp coordinate system does not comply with these provisions, it must be converted to WGS 1984 first. The following explains how to check the coordinate system and how to convert it.
1. Right-click the layer that you want to check for the coordinate system Properties select tab                    Source️ Check the coordinate system.


2. Make sure the coordinate system is as shown in the example. If different, for example: UTM with         zone, then the coordinate system must be converted first. Click ArcToolbox in the Standard toolbar         Data Management Tool dropdown Projections and Transformations click Project.



3. Configure the Input Dataset or Feature Class for the data to be converted, the Output Dataset or    Feature Class for the location and name of the output shp to be generated, and the Output Coordinat System for the coordinates to be generated (Geographic Coordinate System – World - WGS 1984) click OK. The converted shp will be automatically added to the layer in the Table of Contents.

Geometry Accuracy of Satellite Image

To identify vector accuracy in satellite imagery, accuracy in observing points, lines and areas on SPOT 6 and 7 satellite images is required. This is done by zooming in on the digitized results that have been formed, as in the following example. To do the editing in the next sub-chapter (Editing Data) it will be explained how to do basic editing of the features that have been formed.


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