Contour Generation using 30mt Resolution SRTM DEM in ARCGIS

Hello Friends
This video tutorial demonstrates the process of downloading SRTM DEM data, reprojecting it to UTM, and generating contour lines using ArcGIS.
Importance: Contours are crucial for visualizing terrain and understanding elevation changes in geographic studies.
Step 1: Downloading SRTM DEM Data
Source: SRTM data can be obtained from various sources such as USGS Earth Explorer or NASA's LP DAAC. User need to register on portal and get user/password to download DEM.
Format: Ensure to download the 30m resolution data for detailed analysis.
Tips: Use specific coordinates or bounding boxes to limit your download area.
Step 2: Importing Data into ArcGIS
Open ArcGIS: Start a new project and set your workspace.
Add Data: Import the downloaded SRTM DEM into ArcGIS.
Step 3: Reprojecting the DEM
Why Reproject?: Reprojecting ensures the data aligns correctly with other spatial datasets.
Tool Used: Use the “Project Raster” tool.
Settings: Select the appropriate UTM zone based on the DEM’s geographical location.
Output: Save the reprojected raster for further analysis.
Step 4: Generating Contours
Tool Used: Access the “Contour” tool in ArcGIS.
Input Data: Select the reprojected DEM as input.
Settings:
Set the contour interval according to your analysis needs (e.g., every 10m).
Define the output feature class for the contour lines.
Run the Tool: Execute the tool to create the contours.
Step 5: Visualizing and Exporting Contours
Style Customization: Adjust the symbology of contour lines for better visualization (e.g., color, thickness).
Export Options: Save the contours in desired formats (e.g., shapefile, geodatabase) for future use.
Conclusion
Summary: The tutorial effectively guides through downloading SRTM DEM, reprojection, and contour generation in ArcGIS.
Applications: These contours can be used in various applications, such as landscape analysis, urban planning, and environmental studies.