Earth Sensor Portal - Query and Search Features
Author: Martin Flood
Published On: October 15, 2020
Earth Sensor Portal is our Amazon Web Services (AWS) hosted ("cloud") system designed to provide secure access to a catalog of raster and point cloud data products (i.e. LIDAR, NAIP, Landsat, orthophotos) for both viewing and download/ordering for authorized users. Earth Sensor Portal provides an online catalog for your organization's data with an intuitive query interface that supports searching for data by any combination of product type, product metadata and data location.
ESP was crated as the processing, cataloging and delivery solution for the Multi-User System for Earth Sensing (MUSES), a Teledyne Brown sponsored project for the processing of hyperspectral data collected by the DLR Earth Sensing Imaging Spectrometer (DESIS-30) operating on the International Space Station (ISS). ESP is also available as a stand-alone web service for any organization looking to host their geospatial data archive in the cloud and make that catalog available to the public.
Figure 1 : Earth Sensor Portal (3D Globe View)
Query and Search
Any public data catalog requires a robust query and search capability to be an effective portal for discovery and retrieval. Users need to be able to quickly identify what data is available in their area of interest and then narrow that down to the specific data sets using metadata filters. Querying and finding data by location has always been supported in Earth Sensor Portal. Users can enter a specific address or spatial location or browse/search a Name Gazetteer to drive to the location they are interested in reviewing. They can then see the various data sets available in the catalog that cover the area and download the data for their area of interest. We have added the ability for ESP users to further refine their searches by allowing them to specify a range of values to include for any of the metadata fields available for the data set of interest. We refer to this as a Histogram search because of the way we visually represent this to the user for ease of use.
Figure 2: Histogram Search of Landsat Data For example in Figure 2 we show a user search in ESP for Landsat data around Albuquerque, New Mexico but filtered by the histogram to acquisition dates between June 4th and July 3rd 2020, with cloud cover less than 12.5% and sun angle between 60° and 70°. This type of powerful multifactor querying can be applied to any data sets in the ESP catalog using any of the published metadata for those data sets. This allows users to drill down to the specific data they are interested in retrieving quickly and easily.
Figure 3: Histogram View of Metadata Filter/Query If you are interested in learning more about how to cost-effectively publish your geospatial data catalog using Earth Sensor Portal, for public or private stakeholders, please give us a call or email us at [email protected] to arrange a demonstration.