WESM (Work unit Extent Spatial Metadata)

Introduction

Spatial metadata for the 3D Elevation Program (3DEP) is available by work unit in the Work Unit Extent Spatial Metadata (WESM) geopackage. The WESM is a source of information for current lidar data availability and basic information about lidar projects, including lidar quality level, data acquisition dates, and links to project-level metadata. The Work unit Extent Spatial Metadata (WESM) contains information about what Lidar Point Cloud (LPC) and source DEMs (also known as Original Product Resolution (OPR) DEMs) work units have been processed and made available to the public. It contains information about lidar projects, including lidar quality level, data acquisition dates, and links to project-level metadata.
A new WESM is written almost daily as more lidar projects are processed and published.

Data Source Characteristics

Data Target Characteristics

  • Database management system: PostgreSQL

  • Database name: io_lidar_db

  • Database table:

    • wesm

Data Processing

  • Repository: io-lidar-data

  • Script: run_io_lidar_data_dev

  • Tasks:

    • w_m_u (Update all WESM metadata: l_w_c, l_w_m, r_d_s …) or

    • l_w_c (Load the WESM CSV file into the PostgreSQL DB)

Processing Steps:

  1. Download the WESM csv file from url https://rockyweb.usgs.gov/vdelivery/Datasets/Staged/Elevation/metadata/WESM.csv.

  2. Check and store the csv data in the database table wesm.

For detailed processing steps, refer to the external repository: io-lidar-data

Configuration Parameters:

wesm_csv_delimiter = ","
wesm_csv_quotechar = "\""
wesm_gaps_color_cover = "blue"
wesm_gaps_color_gap = "red"
wesm_gaps_dpi = 300
wesm_gaps_image_file_alaska = "resources/io_wesm_metadata_gaps_alaska.png"
wesm_gaps_image_file_hawaii = "resources/io_wesm_metadata_gaps_hawaii.png"
wesm_gaps_image_file_mainland = "resources/io_wesm_metadata_gaps_mainland.png"
wesm_timeout_connect = 3.5
wesm_timeout_read = 10.5
wesm_url = "https://prd-tnm.s3.amazonaws.com/StagedProducts/Elevation/metadata/WESM.csv"

Contact Information

  • Phone: 1-888-392-8545