Daniel J. Dufour
Daniel Dufour is the CEO of GeoSurge, a geospatial tech company with a focus on data compression, natural language processing, remote sensing, and visualization. He created or co-created several open-source geospatial projects, including geotiff.io, georaster, georaster-layer-for-leaflet, geoblaze, geowarp, and proj4-fully-loaded.
This presentation will go over recent updates to GeoBlaze, including the addition of support for Cloud-Optimized GeoTIFFs. We will also discuss the roadmap for the next couple years.
GeoBlaze can be used wherever vectors and rasters meet. You can use it to calculate the hectares of wheat in a country, the change in daily median earth temperature, and identify wildfires in satellite imagery.
GeoBlaze is built on top of the following open-source projects: dufour-peyton-intersection, georaster, geotiffjs, and calc-image-stats.
- Time Series Analysis with GeoBlaze: Mean Daily Air Temperature for the Month of May: https://observablehq.com/@geosurge/time-series-analysis-with-geoblaze-mean-daily-air-temperat
- Identifying Carr Wildfire with Landsat 8: https://observablehq.com/@geosurge/identifying-carr-wildfire-with-landsat-8
- Hectares of Rainfed Wheat in Ukraine: https://observablehq.com/@danieljdufour/hectares-of-rainfed-wheat-in-ukraine
GeoRasterLayer is a LeafletJS Plugin for visualizing GeoTIFFs. This presentation will show live demos of new features and discuss the roadmap for the next couple of years.
- Support for nearly all projections, thanks to proj4-fully-loaded and epsg.io
- Super faster rendering thanks to a simple nearest neighbor interpolation
- Use of web workers means seamless integration that doesn't block main thread
- Loads large geotiffs greater than a hundred megabytes
- Supports custom rendering including custom colors, directional arrows, and context drawing
- Doesn't depend on WebGL
- Edge Compute: Cool Stuff You Can Do With COGs in the Browser
- 2019 - Algorithm Walk-through: How to Visualize a Large GeoTIFF on Your Web Map
- Loading the georaster-layer-for-leaflet library along with GeoBlaze via a script tag. You can view the source code here and the live demo here.
- Combining two Cloud Optimized GeoTIFFs together to create an NDVI map. You can view the source code here and the live demo here.
- Identifying Wildfires from a Landsat 8 Scene. You can view the source code here and the live demo here.
- Visualizing Population COG. You can view the source code here and the live demo here.
- Display a COG that represents only one band of a Landsat scene. You can view the source code here and the live demo here.
- Display a COG with YCbCr Photometric Interpretation. You can view the source code here and the live demo here.
- COG: Cloud-Optimized GeoTiff ( https://www.cogeo.org )
- COPC: Cloud-Optimized Point Clouds ( https://copc.io )
- Flatgeobuff ( https://flatgeobuf.org )
- GeoParquet ( https://github.com/opengeospatial/geoparquet )
- STAC: SpatioTemporal Asset Catalog ( https://stacspec.org )
- Zarr ( https://zarr.readthedocs.io )