Flooding Analysis Help

Full disclosure, my son works for this company!  They are developing a new product for hydrologists that might need extra compute power for their computations and analysis.  If you work in government, anywhere in the US, and work on contracts with engineering firms that specialize in hydrology projects, they would really like to talk with you.  Read on below and thanks!  -mike

We are looking to talk with people who work in city or county level government who are involved with issuing the calls/contracts to carry out stormwater risk assessment and analysis.  We are working closely with civil engineering firms to carry out flooding simulations due to weather conditions or dam breaches.  Some of the issued contracts come under the names of:

  • Dam safety studies
  • Flood/inundation mapping/remapping
  • Whole watershed mapping study
  • City master plans

I would love to talk to people who are involved in these studies.

Kind regards,

Ivan Ravlich
CEO, Hypernet Labs, Inc.

Webinar: CGIA and Promoting GIS in California

The California Geographic Information Association (CGIA) kicks off 2020 with a brown bag speaker series that explores the role GIS plays in various types of organizations, how it is helping to achieve success, and why it should be a part of any strategic plan.

Join CGIA in this first webinar for a general member meeting to learn more about what CGIA is doing to promote GIS in California. We will also hear from Tamar Foster, Deputy Executive Director of the Little Hoover Commission about the findings of their recent report, “Mapping a Strategy for GIS.”

The webinar will be held Tuesday, March 3, 2020, 2:00 pm – 3:00 pm, PST.  Click here for more info and to RSVP.

US Interagency Elevation Inventory

Dear colleagues,

The USGS National Geospatial Program is again updating the US Interagency Elevation Inventory. We invite you to provide us information so that your data is discoverable by others. Your data need not be in the public domain, and the entry will provide a link to inquire about the data, or to a download site if available. This is not a repository for data; it is a way to make data findable. If you have high quality lidar data you wish to donate to USGS data repositories, we can have the conversation at any time.


If you wish to make your data discoverable through the inventory, we will need the following:
  • Shapefile footprint with metadata
  • Vendor tasking, if available
  • Status (in work, available, etc.)
  • Restrictions (if it is public domain)
  • QA or acceptance reports (so we can calculate quality level)
  • Contact information (for internal purposes only; no PII will be publicly posted)
  • url for download or public inquiry (if available)
Due dates are as follows:
  • Arizona (to Drew by COB 3/25/2019)
  • Nevada (to Carol by COB 3/11/2019)
  • Hawaii (to Drew or Carol by COB 3/25/2019)
  • Pacific Basin Islands (to Drew by COB 3/25/2019
  • California (to Drew or Carol by COB 3/25/2019)

If you have an awareness of data that you did not procure, we are happy to chase down the source if you can provide a pointer to a contact person. We try to duplicate what currently shows in both NOAA’s digital coast and Opentopography.org. If you have updates to an existing entry on the inventory, please let us know by the due dates above.

Any questions, please call either one of us, and feel free to pass this request along to others inside or outside of your organization so that our inventory can be as up-to-date as possible.


Carol and Drew

Drew Decker
National Map Liaison
U.S. Geological Survey
4165 Spruance Road
San Diego, CA 92101
619-417-2879 cell

Carol Ostergren
US Geological Survey National Geospatial Program
2885 Mission Street
Santa Cruz, CA 95060
831.460.7539 (office)

Geospatial Historian

The Geospatial Historian is “a tutorial-based open access textbook for historical scholars and digital humanists designed to teach practical digital mapping and GIS skills that are immediately useful to real research needs.” Under Lessons, you will find two series of GIS tutorials geared towards historical analysis and applications. The first series, which uses open-source software, is comprised of four lessons that the project team created for the Programming Historian. The second series contains five lessons that teach mapping, georeferencing, and other applications using ArcGIS. The site also offers a helpful list of resources for Finding Spatial Data, organized by data type and featuring data from around the world. Check it out!



OpenTopography provides high-quality geographic data relating to earth science as well as a platform for researchers to share their own data. Based at the University of California, San Diego, OpenTopography is an ambitious project that “facilitates community access to high-resolution, Earth science-oriented, topography data, and related tools and resources,” and is funded through the National Science Foundation.

You can search or browse the project’s datasets via an interactive data map and a data catalog, both found under Data. Most of these datasets are available in Lidar point cloud format, and many are also available in other formats, such as raster or Google Earth.  Check it out!


California Releases Interactive Public Geoportal

California has adopted a massive, interactive online database of location-based government data that includes over 1200 publicly available data sets from 25 state entities.

The California State Geoportal collects geospatial data from government agencies including housing, water, transportation and health information. The data is compatible with geolocation software and is designed to be shared, layered onto maps and analyzed.

The portal was designed by ESRI.  Check it out!