version_history.md

Version History

• v2.2

  • added the OD Cost Matrix to Parquet Dataset tool; the Parquet format is great! No more .csv's!
  • added the Accessibility Calculator for R notebook that makes use of r5r to calculate accessibility entirely within RStudio; the tool also uses Parquet to store the od matrix on disk
  • fully reproducible code for the sample analysis of census block accessibility to jobs in New York City
  • fixed the od_lines referenced before assignment error that arises when a particular batch returns no results in the ArcGIS Pro tools

• v2.1 added the OD Cost Matrix Calculator for ArcGIS Pro 2.4 Multiprocessing for the rapid calculation of raw origin-destination cost matrices

  • takes full advantage of your multi-core PC
  • joins back in the original origins ID for further analysis
  • note - the final merge of all the worker matrices might take a while for very large analyses with billions of rows as this operation is still single-threaded

• v2.0 the Accessibility Calculator for ArcGIS Pro has been entirely rewritten and is now 4 to 5 times faster

  • introduced a new version of the tool called Accessibility Calculator Pro MP for ArcGIS Pro 2.4 or above that takes advantage of parallel processing and data access cursors for dramatic improvements in processing time
  • main functions are now moved to the access_calc_main.py file which can be run from either the Python toolbox or command line
  • impedance parameters are now stored in their own separate parameters.py file and streamlined for easy editing
  • the tool now includes .xml files for help pop-ups in the geoprocessing window
  • the Accessibility Calculator for ArcGIS 10x and earlier versions of ArcGIS Pro have been moved to the legacy_tools folder

• v1.1 altered the Accessibility Calculator for 10x and Pro:

  • introduced a new version of the Accessibility Calculator for ArcGIS Pro 2.4 that uses the new arcpy.nax Network Analyst module introduced in ArcGIS Pro 2.4. This module stores intermediate network analyst data in_memory and promises to be significantly faster. To take advantage of this, the new 2.4 version of the Accessibility Calculator also stores its intermediate data in_memory and together these changes result in about a 25% improvement in speed versus the old version of the tool (this on a PC with an SSD - the savings will be even more dramatic with a spinning drive). However, if you are memory constrained, stick to the older version of the tool.
  • fixed an error related to assigning sequential IDs in the batch calculator for Pro introduced after updating to ArcGIS Pro 2.4
  • changed the search criteria and search query parameters to valueTables to make it much easier to specify search restrictions
  • changed the search tolerance parameters to proper linear unit data types
  • changed the departure time parameter to a proper datetime format for the Pro toolboxes

• v1.0 original release alongside the paper in Transport Findings