Searching for Data

You may search for data by setting the search parameters on the right-side panel and defining your geographic location. You are not required to set a geographic location and may conduct searches on a global extent, however the search results will only appear plotted on the map if there are 25,000 results or less and narrowing the geographic extent may help minimize the results. Narrowing the search parameters may also help to meet 25,000 results. You may check the right-side panel to keep track of the number of search results found. Every time a search parameter is changed, the map will automatically search for data. If you change the geographic extent, you are required to click Search Now on the right-side panel. The search results will appear as blue markers with numbers that indicate the number of time series measured near that location. The following search parameters are described below:

Data Services

Click on the rows to highlight certain publishing organizations or keep all rows unselected to search for all data services. Also, you may click the checkbox in the upper right corner to Select all non-gridded data services (click here to learn about gridded data services).


Keywords represent the property being observed (e.g. precipitation, temperature, specific conductance, etc.). To learn more about selecting a keyword in HydroClient, click here.

Advanced Search

The advanced search parameters enable users to search by data type, general category, sample medium, and value type. These search parameters are taken from the CUAHSI Controlled Vocabulary Database. Browse the definitions below to understand each search parameter:

  1. Data Type: categorizes data sets into types that convey the frequency of observations or post-processing of the data such as average, cumulative, minimum over a time period.


  1. General Category: labels the category of the data such as “Water Quality” or “Hydrology.”


  1. Sample Medium: describes the medium which is being sampled for laboratory analysis or the medium in which a sensor is placed.


  1. Value Type: conveys the type of observation that is being made. For example, was a measurement made in the field or is it a value that comes from a model run?

For all search parameters, click and highlight the rows of interest in the dialogue box and remember to save and close. Each time you make a change to a search parameter, a search will automatically complete. Remember that search results will only plot on the map if you there are 25,000 or less time series found. You may also refine the geographic location on the map to narrow your search results to a region of interest.

Define the geographic location on the map in three ways:

  1. Enter a location in the search box on the top left of the home screen
  2. Double click on a specific place to zoom in
  3. Use the zoom buttons and click and drag to pan to the location of interest
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