Getting Started Guide
Learn how to use Off-Nadir Delta to explore satellite imagery in just a few minutes. This step-by-step guide will walk you through everything you need to know.
No prior experience with GIS or satellite data is required. Follow these steps and you will be viewing satellite imagery of any location on Earth in no time.
Create Your Free Account
Sign up in seconds to start exploring satellite imagery. No credit card required for the free tier.
- Click "Get Started" on the homepage
- Enter your email address and create a password
- Verify your email to activate your account
- You will receive free tokens to start exploring
💡 Tip: Your free tokens are enough to explore several locations and learn how the platform works.
Navigate the Map
Use familiar map controls to navigate to any location on Earth.
- Click and drag to pan the map
- Use scroll wheel or pinch to zoom in/out
- Use the search bar to find specific locations by name
- Click the location button to center on your current position
💡 Tip: Zoom in to at least level 10-12 before searching for satellite imagery for best results.
Search for Satellite Imagery
Find available satellite images for your area of interest.
- Open the "Satellite Images" panel from the sidebar
- Select a satellite: Sentinel-1 (SAR) or Sentinel-2 (Optical)
- Choose a date range to search
- Click "Search" to find available imagery
- Browse results and select images with low cloud cover (for optical)
💡 Tip: Sentinel-1 SAR works through clouds, while Sentinel-2 optical needs clear skies for best results.
Add Layers to Your Map
Display satellite imagery and manage multiple layers.
- Click on a search result to preview the footprint
- Click "Add to Map" to display the imagery
- Use the Layer Manager to reorder, show/hide, or remove layers
- Adjust opacity to compare with basemap or other layers
💡 Tip: Add multiple images from different dates to compare changes over time.
Analyze Changes Over Time
Compare satellite images from different dates to detect changes.
- Add images from the same location but different dates
- Toggle layers on/off to switch between dates
- Use opacity sliders for smooth comparison
- Look for changes in vegetation, water, urban areas, or damage
💡 Tip: For monitoring seasonal changes, compare images from the same month in different years.
Manage Your Tokens
Understand how tokens work and monitor your usage.
- Tokens are consumed when loading satellite imagery tiles
- Higher zoom levels and larger areas use more tokens
- Check your token balance in the header or Token Usage page
- Purchase additional tokens when needed through the Billing page
💡 Tip: Start with lower zoom levels to get an overview before zooming in to save tokens.
Quick Reference
Sentinel-1 (SAR)
- • Works day and night
- • Sees through clouds and smoke
- • Best for: floods, disasters, ice monitoring
- • Grayscale imagery
Sentinel-2 (Optical)
- • Requires clear skies
- • Natural color and false color options
- • Best for: vegetation, agriculture, urban
- • Higher visual detail
Ready to explore?
Create your free account and start viewing satellite imagery today.
Get Started Free