Introduction
What is Digitization in GIS ?
Summary
ArcGIS can digitize or trace features without mouse or puck click using several.
options: streaming, tracing or freehand drawing. with these methods, the mouse pointer is trace the desired feature.
Procedure
Digitize by tracing
1. Start an edit session.
2. Navigate to editor toolbar, and click the Create Features button. This opens the Create Features window.
3. Select the layer to edit and the Construction tools.
4. Navigate to the editor toolbar, and click the trace tool.
5. Click the map, and start tracing by moving the pointer.
6. To close the tracing session, right-click > Finish Sketch.
7. To complete one part of digitizing a feature, right-click > Finish Part. click the map again to start digitizing another feature.
Digitize by freehand drawing
1. Start an edit session.
2. Navigate to the editor toolbar, and click the Create Features button. This open the Create Features window.
3. Select the layer to edit.
4. For Construction tools, select Freehand.
5. Click the map, and start the freehand drawing by moving the pointer.
6. Click the map once to stop the drawing session.
Creating Geodatabase and Feature Class
Step-1 Click Add Data and add the given toposheet (TIF File).
Step-2 Open Arc Catalog.
Step-3 Click on the destination folder where to create the Geodatabase.
Step-4 Right click on the folder.
Step-5 Click ‘New’ and another dialogue box appears.
Step-6 Click on either ‘File Geodatabase’ or ‘Personal Geodatabase’ to create a new Geodatabase.
Step-7 A new Geodatabase will be created and
rename the Geodatabase according to our wish.
Here, ‘toposheet geo.tif’ is the given name for the created Geodatabase where.gdb is the extension of the Geodatabase.
Right click on the created ‘toposheet.geo’ and new dialogue box will appear.
Step-8 Click on the ‘Feature class’ to create new feature classes.
A new dialogue box will appear in which name of the new feature class and the type of feature such as point, line polygon is given and new feature classes are created.
Step-9 Here, point feature is created.
After entering the name and type click next.
Step-10 On clicking next, co-ordinates are selected for the feature class.
Here, WGS1984 UTM Zone 43N is selected according to the selected Toposheet. Note-(study area Change the coordinating system to suit you will be selected))
Step-11 Click next.
Step-12 Click next.
Likewise the point and polygon feature classes are created.
The selected grid shown in the image is used for further digitization by creating point, line and polygon shape files.
Step-13 Digitize the point features (home).
Step-14 Digitize the line features (road).
Step-15 Digitize the polygon features (field).
*Finalize the map.
ArcMap Digitization Practice Video...