Using the Selection Tool, in RAS Mapper, you can Add to the selection by using the Ctrl key or Remove from the selection using the Ctrl+Shift key.
Usgs raster data download#
It will also show you what is selected in the Table on the download tool. The USGS Products to Download layer can be used to interactively select datasets. When the products are queried, 2 layers will be added to RAS Mapper: USGS Products Available and USGS Products to Download. The data download tool also assists you in selecting data by providing an interactive layer. Note, this reduces the number files in the table to 9 (of 1137 Available Data Products). For the example figure below, the data have been filtered for just the one meter data ("1m"). The filter capabilities have some built in filters based on grid resolution (1m, 10m, 30m, Original) or you can enter your own filter. To assist you with identifying the data to download, the data download tool has a Filter mechanism. This will place a check mark in the "Data to Download" column. To add a terrain dataset to the Products for Download list, select the product and click the Add Selected button or check the box. This can be a handy option if you already have an existing HEC-RAS model. If you Query Projects using the Geometry for the source extent, the data download tool will automatically restrict the data products returned to just those that intersect the selected geometry. The data download tool is passing on information scraped from the USGS database.
Note that the information about each data set will not necessarily be valid. As shown in the figure below, there are likely to be several elevation data sources for your study area. Once the list of available data has been received, the Available Data Products table will be populated as well as showing information about the dataset including Cell Size, Description, Date (Published), File Size, and Web Link to metadata.
When you query the USGS database, the interface will provide feedback that it is working, as shown below. At this time, you can ask for Elevation Model data or Topo Maps (in case you want those as background layers). Next, press the Query Products button to ping the USGS server to see what data are available.
Usgs raster data manual#
The extent options include Current View, Geometry, Shapefile, and Manual Entry. To get and use the data, you will follow four basic steps.įirst, you will need to identify the Import Extent (the default option in the current view). The figure shown below will be displayed. To access the USGS Terrain download tool, select the Project | Download Data | USGS Terrain menu item. Please refer to the linked manuscript below for more information.To utilize the download tool, you must first have a Projection defined and zoom to the area of interest. Due to Excel’s maximum row constraints, the files have been subset by decade.
Usgs raster data zip file#
The input data sets used to derive trends and PCA results are presented here in the zip file found below. Daily mean-Q data were downloaded from the USGS’s National Water Information System on January 5, 2022, checked for completeness, and converted to cubic meters per second. The final quarter of approved 2020 data for both datasets was downloaded between January 6 and 8, 2022. Spatial-raster datasets of daily P in mm were downloaded from Parameter-elevation Regressions on Independent Slopes Model (PRISM ) on March 30, 2021, and datasets of daily AT in degrees Celsius (☌) were downloaded June 22, 2021, both at a 4-square kilometer (km2) resolution for the contiguous U.S.
We analyzed daily air temperature (AT), precipitation (P), and stream discharge (Q) metrics for 124 watersheds in Maryland, Virginia, and North Carolina, United States, from 1981 through 2020. Streamflow is largely controlled by climate forces, therefore it is likely sensitive to climate changes. Streams provide water for human activities and consumption in much of the world.
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