Monthly Archives: April 2013
by Lara Saikali, Cartographic Product Engineer, Esri. Several community resource centers are available through the ArcGIS Resource Center, including a page dedicated specifically to Hydrology. The Hydrology Resource Center is an online community center that promotes hydro information products created … Continue reading
Every 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).
Version 3.3 of both the ArcGIS API for Flex and ArcGIS Viewer for Flex was released on Monday, April 29th. This is a minor release focusing on enhancements of existing functionality, improving workflows, updated localization, and bug fixes. As a … Continue reading
Visual specifications – what are they and where would I use them, you may ask? Many of you might have symbology and labeling standards for maintaining consistency in your map products. Visual specifications is a tool available in Esri Production … Continue reading
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
Do you have several raster layers that you want to display with the exact same classified symbology? You may want to do this, so that your raster tiles look seamless. However the effort to change the class breaks and color … Continue reading
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
The heavy spring rain and late season snowfall have forced many communities in the Midwest to deal with seasonal river flooding. As warmer temperatures move north, the snow melt and additional rainfall will increase the chance of flooding down river. … Continue reading
By Aileen Buckley, Esri Professional Cartographer The demonstration that I gave at the 2013 AAG Annual Meeting has an associated PowerPoint presentation that you can now download. The Mapping Flow Data presentation is about 16 MB because it has videos.
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.