2021 Bay County TPO National Accessibility Evaluation Data

<p><b>Overview:</b></p><p>This document describes the 2021 accessibility data released by the Accessibility Observatory at the University of Minnesota. The data are included in the National Accessibility Evaluation Project for 2021, and this information can be accessed for each state in the U.S. at https://access.umn.edu/research/america.  </p><p>The following sections describe the format, naming, and content of the data files.</p><p><b>Data Formats: </b></p><p>The data files are provided in a Geopackage format. Geopackage (.gpkg) files are an open-source, geospatial filetype that can contain multiple layers of data in a single file, and can be opened with most GIS software, including both ArcGIS and QGIS.</p><p>Within this zipfile, there are six geopackage files (.gpkg) structured as follows. Each of them contains the blocks shapes layer, results at the block level for all LEHD variables (jobs and workers), with a layer of results for each travel time (5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60 minutes).  </p><p><ul><li>{MPO ID}_tr_2021_0700-0859-avg.gpkg =  Average Transit Access Departing Every Minute 7am-9am</li><li>{MPO ID}_au_2021_08.gpkg = Average Auto Access Departing 8am</li><li>{MPO ID}_bi_2021_1200_lts1.gpkg = Average Bike Access on LTS1 Network</li><li>{MPO ID}_bi_2021_1200_lts2.gpkg = Average Bike Access on LTS2 Network</li><li>{MPO ID}_bi_2021_1200_lts3.gpkg = Average Bike Access on LTS3 Network</li><li>{MPO ID}_bi_2021_1200_lts4.gpkg = Average Bike Access on LTS4 Network</li></ul></p><p>For mapping and geospatial analysis, the blocks shape layer within each geopackage can be joined to the blockid of the access attribute data.  </p><p><b>Opening and Using Geopackages in ArcGIS:</b></p><p><ol><li>Unzip the zip archive</li><li>Use the &quot;Add Data&quot; function in Arc to select the .gpkg file</li><li>Select which layer(s) are needed — always select &quot;main.blocks&quot; as this layer contains the Census block shapes; select any other attribute data layers as well.</li></ol></p><p>There are three types of layers in the geopackage file — the &quot;main.blocks&quot; layer is the spatial features layer, and all other layers are either numerical attribute data tables, or the &quot;fieldname_descriptions&quot; metadata layer. The numerical attribute layers are named with the following format:</p><p>[mode]_[threshold]_minutes</p><p><ul><li>[mode] is a two-character code indicating the transport mode used</li><li>[threshold] is an integer indicating the travel time threshold used for this data layer</li></ul></p><p>To use the data spatially, perform a join between the &quot;main.blocks&quot; layer and the desired numerical data layer, using either the numerical &quot;id&quot; fields, or 15-digit &quot;blockid&quot; fields as join fields.</p>