Unit Conversion
Convert the length and area units you meet constantly in remote sensing — metres, kilometres, feet and miles; square metres, hectares, acres and square kilometres. Converts live as you type.
Convert a measurement
Band Combinations
Pick a satellite and what you want to see. Get the exact R-G-B band recipe — with the physical band each channel maps to — plus a short note on what the composite reveals.
Build a composite
Spectral Indices Calculator
Choose an index, enter the band reflectances it needs, and get the exact value with its formula. Ratio-based indices are scale-independent, so surface reflectance (0–1) or scaled values both work.
Calculate an index
UTM Zone Finder
Enter a longitude and latitude to get the correct UTM zone, hemisphere, EPSG code and central meridian — everything you need to set the right projection before you start.
Find the zone
Map Scale Calculator
Enter a distance measured on the map and the real ground distance it represents. Get the standard representative fraction, e.g. 1:50,000.
Compute the scale
Classification Accuracy
Enter the four cells of a binary confusion matrix to get Overall Accuracy, the Kappa coefficient (with its Landis & Koch strength rating), and the per-class user's and producer's accuracy.
From a confusion matrix
Index Value Interpreter
Enter a spectral index value and see which physical class it falls into, where it sits on the accepted threshold scale, and the primary academic reference.
Interpret an index value
Cloud Cover & Usability Scorer
Turn a scene's cloud, shadow and snow metadata into a single usability score so you can decide at a glance whether an image is worth downloading.
Score a scene
BBox & GeoJSON Extractor
Drag a rectangle on the canvas — or type exact bounds — to define a study area, then copy it out as a bbox array, GeoJSON, WKT, or a ready-to-use bounding box for Python or WKT.
Select an area
Export
Pixel-to-Ground Area Calculator
Turn a pixel count and a sensor resolution into real-world ground area and footprint — so you know exactly how much land a raster, tile or study extent actually covers.
Raster dimensions
Seasonality & Date Planner
Enter your study latitude and what you're mapping, and get the acquisition months that give the cleanest, most useful imagery — before you spend time searching archives.
Plan acquisition windows
Multi-Index Synergy Recommender
Pick your analysis target and get the complementary stack of spectral indices that cross-validate each other — so a single index's blind spots don't drive your result.
Recommend an index stack
Target Threshold Matrix Generator
Choose a land-cover target and get a decision matrix of index thresholds you can drop straight into a classification rule set or a methods section — exportable as CSV or Markdown.