Geospatial Annotation

Interface for annotating images with geo referencing

Overview

Diffgram's geospatial annotation was made specifically to work with images that have geo referencing (aerial photos and satellite imagery is a good example of the geospatial data) and all the annotations have to be made not only in the coordinate system of the image, but also in geographical coordinates.

Features

• Various annotation primitives (Circle, Box, Point, Polygon, Polyline)
• Attributes (Select, Radio, Multi-select, Free text, Time, Date, Tree)
• Global attributes (Same as attributes, but applied to the file instead of instance)
• Tile manager (add, remove, hide and change opacity of the slippy map tiles)
• Export to JSON file

Supported Data Types

• GeoTIFF: Standard or COG (EPSG:3857 and EPSG: 4326 coordinate systems are supported)
• NITF (Coming soon)

More on geospatial data

If you are new to the geospatial data, and not sure how it's different from standard image annotation - there are some reading materials for on geospatial data:

• GeoAI: spatially explicit artificial intelligence techniques for geographic knowledge discovery and beyond
• What is a GeoTIFF?
• Earth Lab - a lot of materials, tutorials, courses and more about GIS and data intensive science
• Free satellite imagery datasets

Sample data

Sample file:

• Example One
• Example Two

Free datasets:

• SEN12-FLOOD : A SAR AND MULTISPECTRAL DATASET FOR FLOOD DETECTION

Feel free to suggest more free datasets, if you know any