Category Archives: ArcGIS Online
Masking ArcGIS Online web maps
(Contributed by Owen Evans, Esri solution engineer). A mask is an effective way to make the area of interest in your web map stand out. For example, let’s say I am making a map of the projected population growth for Minnesota. … Continue reading
Red, Blue and Purple: mapping the 2012 US Presidential Election
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very time an election occurs, maps become a key component in telling the story, but what type of map best tells the story of the winners and losers? Red/blue choropleths? Areas shaded in an array of purples? Value by alpha maps? Dot density by County? Ultimately, the areas used (e.g. Counties) are arbitrary, exhaust space and dictate the visual pattern we see. We can warp them into cartograms but these sometimes distort geography too much for them to make much sense. The patterns we see are as much a product of the boundaries as the voting patterns of real people in real places. This blog entry explores different ways to map election results and describes a different type of map we made to show the 2012 Presidential election results…it’s a multiscale dasymetric dot density web map (viewable on ArcGIS Online).
What’s New in ArcGIS Online (April 2013)
It’s time to refresh your browser – ArcGIS Online has been recently updated. This refresh to the March 2013 release offers enhancements for web maps and delivers changes to beta functionality offered to organizations. Map viewer enhancements Round-trip directions Directions … Continue reading
Getting Started with Operations Dashboard for ArcGIS
A few weeks ago we held a Live Training Seminar introducing the Operations Dashboard for ArcGIS. Monitoring Data Using Operations Dashboard for ArcGIS is available on the Esri Training web site so if you missed it you can sign in with your Esri Global account and watch it now! There were a lot of great questions asked over the course of the day and unfortunately we could not answer all of them during the Q&A. Continue reading
Updating ArcGIS.com Hosted Feature Services with Python
More organizations are moving towards using ArcGIS.com hosted feature services to serve data. One common task that has become a popular question of late is, “How do I automatically update the data within this hosted service?” For example, your organization may want to push nightly updates to keep synchronized with the daily changes made by your Desktop users. One of the easiest ways this can be done as this blog describes, is by overwriting the feature service completely with an updated one.
The following Python script demonstrates how to:
- Turn a map document into a sddraft.
- Modify the XML inside with the appropriate settings.
- Analyze the draft for errors.
- Stage the sddraft into a .sd (service definition) file.
- Upload the service to ArcGIS.com. Note that this code shares the feature service with everyone on ArcGIS.com.
Discover San Francisco Hackathon
Last weekend Esri joined forces with Airbnb, the City of San Francisco’s Mayor’s Office of Innovation, and GAFFTA to put on the Discover SF Hackathon. This event brought together designers, developers, and entrepreneurs to hack the urban experience by promoting discovery and exploration for residents and tourists alike.
Filtering, performing analysis, and building a web map application with ArcGIS Online
With ArcGIS Online, individuals, governments, and organizations alike can create and share compelling map stories. For example, by using just two map layers, law enforcement officials could use ArcGIS Online to determine the locations where crimes are occurring, perform spatial … Continue reading
Community contributions added to the World Topographic Map
We recently deployed additional community contributions to the World Topographic Map.
Legacy geocoding and routing services at http://tasks.arcgisonline.com will be retired on December 31, 2013
Over the past several months, Esri has published a new and expanded set of geocoding and routing services through the ArcGIS Online platform. These new services include substantially expanded coverage around the world, as well as new capabilities such as … Continue reading
U.S. Soils Data Added to World Water Online
By Lori Armstrong
The World Water Online (WWO) group in the ArcGIS Resource Center has 12 new web map applications based on the SSURGO soil survey database. These apps show soil characteristics that are useful for hydrologic modeling, such as drainage class, available water storage, water table depth, and ponding frequency. The hydrologic group code, which classifies soils based on infiltration rate, can be used to calculate curve number and model how much rain falling in an area will become runoff.
