• Tips and Tricks

    “Dashboardable” data at your fingertips

    Have you built a dashboard yet?  If not, now is the time! The amount of data surrounding COVID-19 is endless and provides a starting point to explore visualizations with dashboards, charts and maps. The Rhode Island Department of Health’s COVID-19 data tables have been made available on their Hub Site.  These are the same data values they use for reporting in the Rhode Island COVID-19 Response Data dashboard. Where to begin! This workflow requires you to have publishing privileges in your ArcGIS Online Organization.   FIRST: Find the data Scroll to the bottom of the RIDOH’s dashboard to the Click Here button.  This will take you to the raw data files…

  • Tips and Tricks

    Hosted Feature Services: Did you know?

    Feature services can be used as input features when running analyses.  That’s right, while using analysis tools such as clip or buffer, just point to a RIGIS feature service as the features to be clipped, buffered, or as the clip “cookie cutter.”  These data do not need to be downloaded;  you work with them directly from the hosted environment on ArcGIS Online. I am using ArcGIS Pro to describe this operation but the similar process would apply to ArcMap as well. Example: Clip feature service using local area of interest polygon data. Add the hosted feature service – Flood Hazard Area to the map. Add local polygon data to use…

  • Data,  Tips and Tricks

    Download Image Service Tiles

    Last post we looked at how to connect to the RIGIS image services within desktop GIS.  Did you know that you are able to download selected tiles from these image services within ArcMap and ArcPro?  Let’s step through how: SELECT TILES TO DOWNLOAD Add an image service layer to your map. Zoom in on an area. Use the select tool to define an area of tiles to download (draw a rectangle or select an area by just clicking) NOTE: the download operation is limited to 20 tiles at a time. Once the tiles are selected, you may need to remove the overview extents that are selected.  Follow the appropriate workflow:…

  • Tips and Tricks

    Webmap to Apps

    Learn how to share your web map as an application. This cascade app steps through the process of saving and building two different applications from the same webmap.  Discover how to highlight your information and capture the attention of your audience.

  • Tips and Tricks

    Don’t Need it All? Try Filtering!

    At times you may not need to download an entire GIS dataset. For instance, the contour line datasets available from RIGIS are quite large and can be slow to draw on your screen. The RIGIS data clearinghouse gives you the option to download a portion of a dataset. You can do this by using the filter tools. Note to desktop GIS users: RIGIS datasets cannot be subset via clips, intersects, etc, via the website. However try adding these a RIGIS feature service to your next desktop GIS project, and then running these tools! You’ll be pleasantly surprised. To filter a dataset using a table on the RIGIS data clearinghouse, first head over there: http://www.rigis.org.   Find a dataset you’re interested in working with. In this case, I’ve chosen…

  • Online Resource,  Tips and Tricks

    Story Map Success

    There were several articles on effective storytelling using apps in the Summer 2018 ArcUser magazine that I found useful. I thought you might as well, here are the links: Why Governments Need to Embrace the Lost Art of Storytelling (Chris Thomas) A More Informed View of City Business (Carla Wheeler) Make Your Story Map Successful (Hannah Wilbur)

  • Tips and Tricks

    When to Choose an ArcGIS Image Service vs an ArcGIS Online Hosted Tile Layer

    The most recent RIGIS orthophotos from Spring 2018 are available as two different types of online services: two different ArcGIS image services and one ArcGIS Online hosted tile layer. Why choose one service over the other? Choose one of the ArcGIS image services if you need any of the following: Ability to zoom into map scales larger than 1:256. Highest possible print quality. Ability to change the appearance of the images, such as applying a different type of stretch or brightness values. Compatibility with open source GIS software that requires WMS or WCS protocol. Use the ArcGIS Online hosted tile layer if: You have a need for speed. The ArcGIS…

  • Tips and Tricks

    Recommended Datum Transformation to Use with RIGIS Data

    Datum transformations help you to more accurately re-project a GIS dataset from one coordinate system to another. Selecting an appropriate datum transformation is a stumbling block for many GIS users when they mashup datasets that use different coordinate systems. Esri ArcGIS Desktop and Pro software have a robust project-on-the-fly system, however it’s worth taking a look at the datum transformation method the next time you’re adding a new dataset that uses a different coordinate system than your map’s. Here at RIGIS, we’re continuing to use Esri’s “NAD_1983_To_WGS_1984_5” datum transformation when projecting data between Rhode Island State Plane NAD83 U.S. Survey Feet (EPSG 3438) and coordinate systems that use the WGS84…