The document summarizes a project to delineate a watershed area and identify streams in the Tomohon Agripolitan area of Indonesia using 3D modeling software. Key steps included creating a digital elevation model from SRTM data, removing errors from the DEM using ArcGIS tools, generating flow direction and accumulation rasters, identifying stream channels, assigning stream segments unique IDs, and using the results to generate the watershed boundary. 3D views of the area were also created in Global Mapper and ArcScene with overlays of rivers and roads.

1. 3D Analyst With Watershed in Tomohon Agripolitan Area Yaulie Deo Rindengan ID Student : G051054041 Lecturer : Ir. Hartanto Sanjaya, PM

2. Software : Global Mapper 7.0 3Dem ArcGIS 9.2 Objective : Make a project about 3D Analyst with : a. Delineate a watershed area. b. Find the streams of the rivers Data : SRTM Tomohon Image

3. Create DEM from SRTM Data N01E124 (Global Mapper) UTM coordinate with GeoTiff (With 3Dem)

4. Some Stage Processing in ArcGIS 9.2 Using the Fill tool to removing an error sink ( by the interpolation process ) Using Flow Accumulation tool to generate a raster map showing flow Using Flow Direction tool to generate a raster grid showing the direction of flow Using Stream Link tool for assign each individual stream segments a unique number Using Watershed tool to generate Watershed

5. Result …. Converting the DEM to Integer using Raster Calculator Removing 2 nd Error Sink

6. Result …. Flow Direction to Generating a raster grid Flow Accumulation to Generating a raster map

7. Result …. Generating Stream Channel Using Raster Calculator Generating Stream Link

8. Result …. Tomohon Watershed Area

9. Tomohon Area Using 3D Global Mapper

10. Tomohon Area Using 3D ArcScene With River

11. Tomohon Area Using 3D ArcScene With Road

12. Tomohon Area Overlaying

13. Tomohon View

14. Thank You