LiDAR ENVI, SOCET GXP, ERDAS, ARCGIS y qGIS.

Introduction

This tutorial will guide you through using LiDAR data with various GIS software, including ENVI, SOCET GXP, ERDAS, ArcGIS, and QGIS. Understanding how to process and analyze LiDAR data is essential for applications in environmental monitoring, urban planning, and topographic mapping.

Step 1: Understanding LiDAR Data

• Definition: LiDAR (Light Detection and Ranging) is a remote sensing method that uses light in the form of a pulsed laser to measure distances to the Earth.
• Applications: Commonly used for creating high-resolution maps, vegetation analysis, and topographic surveys.

Step 2: Setting Up Your Software

• Choose Your Software: Depending on your needs, download and install one of the following:
  • ENVI
  • SOCET GXP
  • ERDAS
  • ArcGIS
  • QGIS
• Installation Tips:
  • Ensure your system meets the software requirements.
  • Follow on-screen instructions for a smooth installation process.

Step 3: Importing LiDAR Data

• Format Compatibility: Check if your LiDAR data is in a compatible format (e.g., LAS, LAZ).
• Import Steps:
  1. Open your chosen GIS software.
  2. Navigate to the data import section.
  3. Select the LiDAR file and load it into the software.

Step 4: Data Visualization and Processing

• Visualizing LiDAR Data:
  • Use 3D views to analyze the terrain accurately.
  • Adjust visualization settings to enhance features like vegetation and buildings.
• Processing Techniques:
  • Apply filters to remove noise and improve data quality.
  • Use interpolation methods for creating digital elevation models (DEMs).

Step 5: Analyzing LiDAR Data

• Key Analytical Methods:
  • Generate contour lines from elevation data.
  • Conduct surface analysis to examine slope and aspect.
  • Perform change detection to identify landscape changes over time.
• Practical Applications:
  • Assessing flood risk areas.
  • Urban development planning.

Step 6: Exporting Results

• Export Options:
  • Save processed data in various formats suitable for sharing or further analysis (e.g., GeoTIFF, shapefiles).
• Steps to Export:
  1. Go to the export menu in your GIS software.
  2. Select the desired output format.
  3. Specify the save location and confirm the export.

Conclusion

This tutorial provided a structured approach to working with LiDAR data across various GIS platforms. By following the steps outlined, you can effectively import, process, analyze, and export LiDAR data for various applications. As a next step, consider exploring advanced analytical techniques or integrating additional data sources for enhanced insights.