Cara Membuat Kontur Dari Google Earth Ke ArcGIS | Tutorial Mudah, Hasilnya Halus Dan Menarik

Introduction

This tutorial provides a step-by-step guide on how to create contour lines from Google Earth data and transfer them into ArcGIS. The process results in smooth, visually appealing contours suitable for various mapping purposes. Alongside contour creation, you will learn how to transform raster data, generate hillshades, and generalize lines for better aesthetics.

Step 1: Download Data from Google Earth

1. Open Google Earth: Launch the application on your device.
2. Navigate to Your Area of Interest: Use the search function to find the geographic area you wish to analyze.
3. Save Image Overlay:
   • Click on the "Add" menu.
   • Select "Image Overlay".
   • Name your overlay and adjust the transparency to help visualize the terrain.
4. Export the Image:
   • Right-click the overlay in the Places panel.
   • Select "Save Place As" and choose the KML format to save your data.

Step 2: Import Data into ArcGIS

1. Open ArcGIS: Start the ArcGIS software on your computer.
2. Import KML File:
   • Use the "KML to Layer" tool to convert your KML file into a usable layer in ArcGIS.
   • Browse for your saved KML file and select it to import.
3. Check the Layer:
   • Ensure the imported layer aligns correctly with your base maps in ArcGIS.

Step 3: Create Digital Elevation Model (DEM)

1. Rasterize the Data:
   • Use the "Rasterize" tool to convert the imported KML data to raster format.
   • Set appropriate parameters, such as cell size and extent.
2. Generate a DEM:
   • Use the "Create TIN" tool or similar methods to create a Digital Elevation Model from your raster data.

Step 4: Generate Contours

1. Use the Contour Tool:
   • Navigate to the "3D Analyst" or "Spatial Analyst" toolbox.
   • Select the "Contour" tool to generate contour lines from your DEM.
2. Set Contour Intervals:
   • Define major and minor contour intervals based on your analysis needs.
   • Major contours are typically spaced further apart, while minor contours are closer together.

Step 5: Create Hillshade

1. Generate Hillshade:
   • Use the "Hillshade" tool found in the 3D Analyst toolbox.
   • Input your DEM and adjust the azimuth and altitude settings to achieve the desired shading effect.
2. Visualize the Terrain:
   • Combine the hillshade layer with your contour layers to enhance the visualization of the topography.

Step 6: Generalize Contour Lines

1. Smooth Out Contours:
   • Use the "Simplify Line" or "Generalize" function on your contour lines.
   • Adjust parameters to achieve a smoother appearance without losing critical detail.

Conclusion

In this tutorial, you learned how to effectively create contour lines from Google Earth data in ArcGIS, including generating a Digital Elevation Model, creating hillshades, and generalizing lines for better visualization. These skills can enhance your mapping projects and provide clearer insights into terrain analysis. For further exploration, consider experimenting with various settings and additional ArcGIS tools to refine your maps.