curvaCAV-GIS - Quick Manual (v1.0.5)

1. Purpose
Calculates Elevation-Area-Volume (CAV/EAV) curves from a DTM raster in QGIS.
Supports polygon layer clipping (with optional single-feature selection),
current map extent clipping, or user-drawn rectangle on the map canvas.

2. Requirements
- QGIS 3.16 or newer
- A raster DTM layer loaded in the project
- No additional Python packages required
- Compatible with Windows, Linux and macOS

3. Installation (from ZIP)
1) QGIS -> Plugins -> Manage and Install Plugins
2) Click "Install from ZIP"
3) Select curvaCAV_GIS_v1.0.5_PTBR.zip
4) Enable "curvaCAV-GIS" in Plugins -> Manage

4. Basic Usage
1) Click the curvaCAV-GIS toolbar icon
2) Calculation tab:
   - DTM raster: choose the raster layer
   - Considered area:
       * Use entire DTM
       * Use polygon layer (optional: select a single feature on the map)
       * Use current map extent
       * Draw rectangle on map
   - Click "Load statistics" to fill min/max elevation from the raster
   - Set Min elevation, Max elevation and Increment
   - Check "Generate chart" to display an EAV chart
   - Click "Calculate"
3) Results tab:
   - View the EAV chart (Area and Volume vs Elevation)
   - Inspect the Elevation-Area-Volume table
   - Copy chart or table to clipboard
   - Set output folder and click "Save results to folder" to export CSV and PNG

5. Disclaimer
The author is not responsible for any results, design decisions or damages
resulting from the use of this plugin. Always validate results against
applicable technical standards.

Author: Rodrigo Goncalves (rcghidro@gmail.com)
Repository: https://github.com/rodcgon/curvaCAV-GIS
