Most discussion of climate change has focused on temperature or sea level rise, but changes in freshwater availability will be an even larger challenge in many regions of the world. This topic is often ignored because it is difficult to … Continue reading
In countries like the United States and Germany, federal agencies keep careful watch on the nation’s rivers, and disseminate their observations to the public. But in developing nations, many of the world’s major rivers remain un-gauged, despite the millions of … Continue reading
The Esri Live Feeds team has just released a new layer and added it to the ArcGIS Online Living Atlas, and also made some improvements to existing layers. In this post we will provide an overview of the updates. USA Weather … Continue reading
Processing templates are a powerful tool for expanding the capabilities of image services. By chaining together a series of raster functions, they provide users with the capability to do on-the-fly analysis, such as converting units, finding anomalies, and calculating slope, … Continue reading
The static blue lines you see on a map don’t tell us much about what those rivers really look like on the ground. Flash floods kill more people each year than tornados, hurricanes, and lightning combined, while drought devastates entire … Continue reading
by Daniel Siegel, Product Engineer, Esri
Most of us understand the hydrologic cycle in terms of the visible paths that water can take: rainstorms, rivers, waterfalls, swamps, etc. However, an even larger volume of water flows through the air all around us in two invisible paths: evaporation and transpiration. They claim 61% of all terrestrial precipitation, and together are referred to as evapotranpsiration. In order to better understand this important process, Esri’s Mapping Center has produced a web map showing the world’s average annual evapotranspiration.