Category: Public Safety
Wildfires, which started in the Great Smoky Mountains National Park in the end of November, recently spread north into Gatlinburg, TN. Normally, prescribed burns, to reduce the forest understory’s accumulating fire fuel and maintain the natural cycle of fire in … Continue reading
Over the past year, we have been migrating the live feeds, provided by Esri Tech Marketing (http://tmservices1.esri.com), to ArcGIS Online. All of these feeds are now part of the Living Atlas collection under the “Earth Observations” category. As we have … 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 people whose lives depend on them. The Dartmouth Flood Observatory hopes to help solve this problem with a concept they call “satellite gauging sites,” which makes it possible to monitor the flowrate of rivers using freely available satellite data, without the need to build or maintain expensive infrastructure.
They key to this method is the microwave sensors carried aboard satellites like AMSR, TRMM, and GPM. As the amount of water on the landscape increases, emissions in the microwave spectrum decrease – a clear signal that can be used to track flowrate. Microwaves are unaffected by cloud, but absorbed by liquid water, which means that Flood Observatory scientists can monitor river conditions even when the ground is visibly obscured by weather.
The numerical estimates are much less accurate than ground-based gauging, of course, but still extremely valuable. As a relative estimate of how the flowrate is changing over time, they can be used to track droughts and floods, and to analyze long-term changes in the flow regime.
In order to make them more easily available to the GIS community, Esri has added these satellite gauging sites to the Live Stream Gauge map. When you click on one, it displays an estimate of today’s average flowrate, a description of the status (e.g. low flow, moderate flood, major flood), and a graph showing the time series. There is also a link to the station page, where you can get monthly and annual flow estimates, as well as some information about the calibration and accuracy of that particular site.
This latest update also included new contributions from England’s Environment Agency, the State of Nebraska, the State of Oregon, and the Iowa Flood Center – over 3000 new gauges in total – so if you haven’t checked it out in a while, now is a great time to take another look. For those of you who have been using this map, please let us know your thoughts about it in the comments. Thank you to all our stream gauge contributors!
[Source: Survey123 for ArcGIS Blog in GeoNet] Around 11:30 A.M. on November 7, 1492, a young boy saw a large stone plummet from the sky and land in a wheat field near the town of Ensisheim in Alsace, France. This … Continue reading
Written By Chait Gaddam
Styles are collections of symbols and other map components that can promote consistency across related map products or organizations. Styles created in previous versions of ArcGIS for Desktop can be used easily in ArcGIS Pro. To import these files:
- On the Insert tab, in the Styles group, click Import.
- Browse to a style file (.style) on your computer or network and click Open.
What’s New with ArcGIS for Local Government, State Government, Emergency Management, Water, Gas and Telecommunications – September 2016
During the September 2016 ArcGIS Solutions Release 2 new Solution Products were added to ArcGIS, 22 Solution Products were updated, 2 were retired and 1 moved to the mature lifecycle phase. To simplify deployment of ArcGIS for Electric, Gas, Telecommunications … Continue reading
[Source: Survey123 for ArcGIS Blog in GeoNet] Following our tradition to update Survey123 once a month, here you have our latest update. This time, we devote the release to the United Nations International Day Against Nuclear Tests. Commemorated on the … Continue reading
We are pleased to announce Drone2Map for ArcGIS version 1.0.1 is available for download from My Esri and the Drone2Map for ArcGIS Help Site. Drone2Map for ArcGIS 1.0.1 is a minor update that brings you improved stability and bug fixes. … Continue reading
As you may already know, Survey123 for ArcGIS is no longer in Beta. We had our first general availability release back in June. All along our beta program tradition was to release updates every month, and we would not want … Continue reading
Over the last ten years, the GIS community has seen an explosion of beautiful, high-resolution multi-spectral imagery, with very rich color fidelity, and very high pixel resolution. Lawrie Jordan, Esri’s Director of Imagery, has called this platinum age of imagery: … Continue reading