Tutorial on DWR’s SGMA Data Viewer and Updated Subsidence Information with Audio Description


-Data Viewer -Hello and welcome to this tutorial
focused on updated subsidence information as part of DWR’s Sustainable Groundwater
Management Act technical assistance. DWR has two primary roles and
implementation of SGMA. The first is an assistance role,
and is the topic of today’s discussion. The purpose of this assistance is to provide
funding, planning, and technical assistance to local water managers
and related entities to use in developing and implementing
their groundwater sustainability plans with the goal of achieving statewide
sustainable groundwater management. One form of technical assistance is the SGMA Data Viewer,
as you can see on the screen. The purpose of the SGMA Data Viewer is to compile, and display regional
and statewide groundwater information, so ground water sustainability agencies
and related stakeholders can efficiently access this information during groundwater sustainability plan,
development, and implementation. Objective data access is, and will
continue to be, an important component of successful GSP development
and SGMA implementation. Currently Sigma related data
are managed and stored in a variety of local state
and federal agencies, making it difficult to find . The SGMA Data Viewer integrates
data from various sources to provide GSA’s, and the public,
with access to query, visualize, and download SGMA relevant data. The Data Viewer provides data mapped
to SGMA sustainability indicators shown on the left side of the
screen. -The mouse hovers over the left toolbar. -DWR has recently updated the SGMA Data Viewer
to include updated subsidence information to help ground water sustainability agencies,
water managers, and others implement the Act. DWR is providing these
standardized statewide datasets to assist GSA’s in their planning efforts. And the new information is available on this application
and includes an existing historical subsidence information an updated satellite based
remote sensing InSAR data from June 2015 to June 2018. InSAR is a technique
of mapping ground deformation using radar images of the Earth’s surface
and is collected from orbiting satellites. So now we’ll go
and demo the new subsidence related information. As mentioned on the left
side of the SGMA Data Viewer, there are categories of information related
to the sustainability indicators. The subject of today
is the land subsidence information. DWR has provided existing subsidence information, including DWR Extensometers,
USGS Extensometers, and other sites. The new updated information
includes an Estimated Vertical Displacement of the land surface from the
1949 to 2005 timeframe. -Portion of California lights up. -This information is provided
for reference material. -Zooms in closer. -You can zoom in
and look at the information as well as transparency functions
to change those features. -Zooms out from the highlighted section of California. -In addition to this new
historical information, there is updated in SAR in imagery, the TRE Altamira InSAR Dataset which includes rasters, or spatial coverages,
of vertical displacement shown on the screen here
for a variety of basins in the state. -Portions of the state light up blue. -When zooming into a
particular area of interest -Zooms in. -you can click on the raster’s -The mouse clicks on a dark red area in San Joaquin Valley. -it brings up a field of the
interpolated displacement value for the time period of
June 13, 2015 to June 1, 2018. [mouse click] When clicking on the displacement value in the table
it brings up another dialog box that shows the location of where you clicked
and a time series of the vertical displacement from June 2015 to June 2018. You can also download this
information in a tabular format in a CSV or Excel file and you click on this
and it brings up a downloaded file. -The mouse clicks to close the download file bar and the grid. -Another feature related to this raster
InSAR Dataset is the grid that was used to generate the rasters the
Vertical Displacement Point Data. [mouse click] This layer requires you
to be zoomed in fairly close in order for the layer to turn on. When you turn on the layer,
you can click on one of these grid cells which brings up another tab
in the table of results. You click on the Vertical Displacement Point Data [mouse click] and it gives you the Point Code, when clicking on the link to the Point Code, it brings up the same dialog box with where the grid that is selected
is located on a map and the time series information. -He scrolls down to the measurement information. -An added benefit of this grid is that each of these grid points
have additional time history that goes back to January 1, 2015
through June 1, 2018. -He traces the line graph, then scrolls down again. -You can also download
these grid or point data sets in a tabular format in CSV or Excel. -He scrolls up to the top and closes the grid. He zooms out on the map. -The location of our additional
information related to these rasters and Point Data related to the
TRE Altamira InSAR Dataset. When hovering over the layer name there’s an info icon that pops up. You click on that info icon [mouse click] and it brings up metadata
related to the layer, the description–a description
of the service and host location, and other guidance and other related information,
as well as contact information. -He scrolls through the text, pausing on the Guidance section. -This information is stored on the California Natural Resources Agency
Open Data Platform under the TRE Altamira InSAR Subsidence Dataset. There is a technical report that explains how the InSAR Data
was collected and reported. There is a link to this tutorial, as well as a link to the
SGMA Data Viewer, and a link to the GIS Image Services
of Vertical Displacement Rasters where you can directly link
to your own data system using an API. There’s additional information on these layers on this open data page including contact information for additional questions
or additional information if needed. -He scrolls through the Additional Information.

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