Welcome to the support page for the Regrid Parcel Data Toolboxes, designed for Regrid Feature Service (FS) customers to streamline and scale up parcel data operations in ArcGIS Pro. These toolboxes were built to support FS customers with their large-scale data analyses in ArcGIS Pro. This library of tools will expand as more use-cases are identified and incorporated.

The toolboxes allow you to efficiently complete large-scale analyses (multi-state or nationwide) by intelligently handling the technical constraints and query limits of high-volume geoprocessing.

Download & Installation

The Regrid Data Toolboxes are provided as standalone Python Toolbox (.pyt) files for easy integration within ArcGIS Pro.

Prerequisites

ArcGIS Pro 3.4.2 or higher
Access to the Regrid Feature Service

Download

Toolbox Name	Description	Download Request
Regrid Parcel Data Toolbox	Tools for core parcel tasks (ll_uuid matching, GEOID-based spatial selections, study area extraction)	Request these tools by contacting your Customer Success Manager
Regrid Add-on Data Toolbox	Tools for Regrid Premium Add-on datasets (e.g. Standardized Zoning JSON Parsing)	Request these tools by contacting your Customer Success Manager

Installation

Save the files

Download the .pyt file(s) and save them to a permanent local folder (e.g., C:\Regrid_Toolboxes)
Open ArcGIS Pro
Click on Insert tab from Catalog pane
Add Toolbox

From the Insert tab, click Toolboxes > Add Toolbox.
Browse to file

Navigate to the folder where you saved the .pyt file and select it.
Confirm

The toolbox (e.g., Regrid Parcel Data Toolbox) will now appear under Project Toolboxes and is ready for use.

Tools Overview

Problem Solved: Scalability in ArcGIS Pro

ArcGIS Pro can struggle with the scale of Regrid's nationwide Feature Service (millions of polygon records). These toolboxes apply:

Data chunking
FIPS or region-based iteration
Efficient filtering

to help you avoid server timeouts, overloaded queries and manual scripting.

Regrid Data Tool Index & Use Cases

Tool Name	When to Use It	Problem Solved
GEOID Spatial Selection Looper	You want to spatially select parcels using an input point or polygon layer that spans many counties or states	Requests with the ArcGIS Pro native `Select By Location` tool fail due to size or volume
Regrid ID Match	You have a CSV of Regrid IDs (`ll_uuid`) and need to extract those parcels	Requests with ArcGIS Pro native `Export Table` tool fail due to server load
Regrid Spatial Chunker	You have a study area (e.g., a HUC8 watershed, a burn area polygon) that spans multiple counties and you need to extract all parcels within this boundary for local analysis.	Requests to `Export Features`fail due to high volume server load

Tool Instructions

GEOID Spatial Selection Looper

Select parcels by spatial relationship across multiple counties by iterating on the GEOID (FIPS Code).

Parameters

Parameter	Input Type	Guidance
Input Layer	Feature Layer	The features (polygons or points) you're using to select parcels
Regrid Feature Layer	Feature Layer	The live Regrid parcel Feature Service
GEOID Field in Input	Text (Required)	Can be any field name in your layer with county GEOIDs (e.g., `FIPS`, `FIPS_CODE`, `GEOID10`)
Regrid GEOID Field	Text (Fixed)	Always `geoid`

Workflow

Ensure both layers (Input Layer and Regrid Feature Layer) are added to your map.
Run GEOID Spatial Selection Looper from the Parcel Toolbox.
The tool will detect, filter, and perform a spatial selection for each GEOID.
Output is a single feature class with all intersecting results merged and added to your map.

Errors and Troubleshooting Tips

GEOID Field in Input must be appended if it does not already exist in your dataset. The tool relies on this input for iteration and will not work without it
Because the tool is batching county requests, it may run for a long time if a lot of counties are included in the input dataset.
The tool may be forced to skip parcel-dense counties (e.g., Cook County, IL) due to the high volume of data. If this occurs, you should process those counties separately by setting Esri's processing extent under Environments and use the Regrid tool for all other input locations.

Regrid ID Match

Efficiently match a large list of Regrid UUIDs from a .csv to parcels in the Feature Service.

Parameters

Parameter	Input Type	Guidance
`.csv` path	File `.csv`)	.csv file with a column named `ll_uuid`
Regrid Parcel Layer	Feature Layer	Use dropdown menu to select the Regrid Feature Service layer already added to your map
Output Layer Name	User defined	Name the table to be outputted to your map

Workflow

Load the Regrid Parcel Feature Service into your ArcGIS Pro map.
Launch Regrid ID Match from the Regrid Parcel Data Toolbox.
Provide the required inputs and click Run.
The tool will validate and process in batches of 1,000 UUIDs.
Output will be added to your map, any failed matches will be reported in the messages panel.

Errors and Troubleshooting Tips

The tool requires the input CSV to have a column labeled ll_uuid
Invalid IDs will be automatically skipped and logged in the error output message
This tool has been tested and validated with an input CSV list as big as 460,000

Regrid Spatial Chunker

Export a large study-area from the Feature Service to your local scratch space for deep analysis.

Parameter	Input Type	Guidance
Study Area Layer (Footprint)	Feature Layer	A polygon boundary representing your area of interest
Regrid Feature Layer	Feature Layer	The Regrid Feature Service
Chunking Grid Matrix Density	Custom Input	An integer representing the rows and columns to be created over the study area envelope. Each bounding box becomes a server request. For small areas use `4`, medium use `8`, and in large areas use `16`.
State Abbreviation Filter	Custom Input (Optional)	The two-letter state abbreviation if your study area is exclusive to a single state (this request is made server side and can speed up data transfer)
Attribute Selection Mode	Custom Selection	`Keep All Fields` or `Custom Field Selection`. `Keep All Fields` preserves the full attribute schema. `Custom Field Selection` is available to choose only those attributes that are essential to your workflow and to speed up the data transfer request. Note that in `Custom Field Selection` some core structural fields (i.e., `ObjectID`, `SHAPE`, `FID)`will be permanently checked to ensure minimum data validity.

Workflow

Ensure that your Study Area Footprint is in EPSG:4326
If using a definition query to limit to a single boundary within a multi-polygon set, the entire spatial extent of the original file is still passed to the sever. Because of this, best practice is to export the individual boundary as its own file and input this as your Study Area Footprint.
Select Your Grid Density Strategically: Density 4 (4*4 =16 cells): Ideal for small, isolated projects, counties, or smaller states (e.g., Rhode Island scale, ~450,000 parcels). Maximizes available bandwidth. Density 8 (8*8=64 cells): Ideal for medium-sized states or dense multi-county regional footprints (e.g., Massachusetts, Ohio). Density 16 (16*16=256 cells): Strictly required for mega-states or dense metropolitan regions (e.g., Florida scale, ~10,000,000+ parcels). Slices dense urban cores into stable, bite-sized data packets.
Attribute Selection Mode offers a dropdown check list. Customizing the attributes to your data needs will enhance data transfer speed.

Errors and Troubleshooting Tips

If the tool fails due to timeouts, you may need to request at a higher Chunking Grid Matrix Density
When requesting a large study area, the tool may run for an hour or more.

Regrid Add-on Data Tool Index & Use Case

This toolbox contains a tool designed for subscribers to Regrid's Premium Add-on Dataset: Standardized Zoning.

Tool Name	When to Use It	Problem Solved
Standardized Zoning Add-on Parse JSON	You are subscribed to the Standardized Zoning Add-on dataset and want to find parcels that permit a specific land use (e.g., "retail") via permitted_land_uses JSON field	Manually parsing JSON attributes natively in ArcGIS Pro

Standardized Zoning Add-on Parse JSON

Search Regrid’s Standardized Zoning Add-on for permitted land uses (e.g., “parking”) and return matching parcels.

Standardized Zoning Add-on JSON Parse form in ArcGIS Pro

Parameter	Input Type	Guidance
Standardized Zoning Feature Layer	Feature Layer	Standardized Zoning Add-on (contains `permitted_land_uses` JSON field)
Parcels Feature Layer	Feature Layer	Premium Regrid Parcel Layer (includes `zoning_id` and `geoid`)
GEOID Filter	Text	GEOID (FIPS code) for the county AOI (e.g., 42003)
Search Term	Text	Case-insensitive land-use keyword (e.g., parking)

Workflow

To run Parse JSON from the Regrid Add-on Toolbox.
Enter the county GEOID and the land-use term.
The tool will identify relevant zoning IDs matching your search, find parcels with those zoning IDs within the specified GEOID and output a parcel feature class containing the matched zoning IDs.

Errors and Troubleshooting Tips

Input handles one GEOID and one search term per tool run

Feedback and Continuous Improvement

These toolboxes were built with customer feedback. If you are encountering frequent errors, or if you've built custom scripts you'd like to see automated—we want to hear from you.

Suggest a Tool or Report a Bug

Have an idea or issue?

Please include:

Your email
Example GEOID
Problem description
Suggested tool name or functionality

Reach us at [email protected]