GDEM V3 vs SRTM 1: a comparison
Some time has past since I last wrote a DEM comparison, comparing ALOS World with SRTM 1 and GDEM V2 with SRTM 3. But as NASA and METI…
Category: Satellite Imagery
Copernicus, Sentinel and your favourite GIS
The Copernicus Program provides an interesting alternative data source for your work with Landsat data… Sentinel images: Copernicus will deliver an unprecedented volume of free data, provide new…
Short Announcement: ESRI World Imagery Basemap now open for OSM Mapping
If you digitize features for OpenStreetMap you might have used Landsat data or the Bing basemap. Now we do have one other source for our armchair mapping approach:…
A Digital Earth: the Potential of Data Brokers
Introduction In my previous two posts I introduced the Cloud based data broker technology ERDDAP and demonstrated how one can use it to obtain geo-spatial scientific environmental data:…
Short Announcement: New Sentinel Cloudless Atlas
Mapbox created a cloudless Landsat map in 2013. That was a huge step for all the webmapping enthusiasts as we got a composit image of the world with…
How to start with “VANE language” API – MODIS example
If you are reading this post – you might know something about satellite imagery. This is a valuable source to power quite a lot of analytics and monitoring…
NASA’s Black Marble 2016 or Syrian Dark Years
About four years ago, Daniel wrote a short article on how to publish a GeoTiff as maptiles and how to use this in a leaflet map. I would…
Description code for article “Using the Google Earth Engine (GEE) for Detection of Burned Areas”
I want to continue my article “Using the Google Earth Engine (GEE) for Detection of Burned Areas” (link) and describe in detail script for detection burned areas. I decided…
Using the Google Earth Engine (GEE) for Detection of Burned Areas
Google Earth Engine ( GEE ) is a cloud platform for processing satellite imageries. This service includes images of Landsat 5, 7,8, Sentinel 1 and Sentinel 2. You…
ALOS World 3D V1.1 vs. SRTM1
Some days ago a new version of the ALOS 30m DEM was released: Void pixels due to clouds and snow pixels within 60 deg. of north and south…
JuxtaposeJS and the Death (and Re-Birth) of Bogoslof Island
This post is just a quick update on a unique event unfolding in my home state of Alaska and a cool new tool to help you post image…
Some ways to produce topographic swath profiles
For a geomorphological study that I am working on I want to produce topographic swath profiles across a mountain range, that is, I want the average elevation along…