ROI Data Loading Options¶
Overview¶
When creating a Region of Interest (ROI), you are defining a specific area to analyze or export. The "ROI Data Option" dialog asks you to choose how the application should retrieve the data for this new region.
Option 1: Load all data immediately¶
- What it does: Forces the application to download all data tiles for the selected area at the highest available resolution right now.
- Best for: Small, focused ROIs where you need to perform an immediate high-resolution export or analysis of the entire region.
- Warning: If the ROI is large, this option will attempt to download a massive amount of data. This can consume all available browser memory, potentially freezing your browser or causing the tab to crash.
Option 2: Load data based on current level (Recommended)¶
- What it does: Treats the ROI like the main map—it only loads the data necessary for your current zoom level. Detailed high-resolution data is loaded only when you zoom in on specific parts of the ROI.
- Best for: Large ROIs or general exploration.
- Benefits:
- Performance: Keeps the application fast and responsive.
- Memory: Uses significantly less memory.
- Safety: Safe to use even for very large regions.
- Trade-off: If you plan to run a process that requires every single point in the ROI (like a full-resolution bulk export), you might need to ensure you've visited/loaded the relevant areas or zoom levels, although many export functions will handle data fetching automatically on the backend/worker where possible.
Summary Table¶
| Feature | Load All Data | Load Based on Current Level |
|---|---|---|
| Initial Load Time | Slow (High data volume) | Fast (View-dependent) |
| Memory Usage | High (Risk of crash) | Low (Efficient) |
| Responsiveness | Can freeze UI | Smooth |
| Best Use Case | Small ROIs, immediate full export | Large ROIs, exploration |