Connecticut State Parcel Layer 2023

The dataset has combined the Parcels and Computer-Assisted Mass Appraisal (CAMA) data for 2023 into a single dataset. This dataset is designed to make it easier for stakeholders and the GIS community to use and access the information as a geospatial dataset. Included in this dataset are geometries for all 169 municipalities and attribution from the CAMA data for all but one municipality. Pursuant to Section 7-100l of the Connecticut General Statutes, each municipality is required to transmit a digital parcel file and an accompanying assessor’s database file (known as a CAMA report), to its respective regional council of governments (COG) by May 1 annually. These data were gathered from the CT municipalities by the COGs and then submitted to CT OPM. This dataset was created on 12/08/2023 from data collected in 2022-2023. Data was processed using Python scripts and ArcGIS Pro, ensuring standardization and integration of the data.CAMA Notes:The CAMA underwent several steps to standardize and consolidate the information. Python scripts were used to concatenate fields and create a unique identifier for each entry. The resulting dataset contains 1,353,595 entries and information on property assessments and other relevant attributes.CAMA was provided by the towns.Canaan parcels are viewable, but no additional information is available since no CAMA data was submitted.Spatial Data Notes:Data processing involved merging the parcels from different municipalities using ArcGIS Pro and Python. The resulting dataset contains 1,247,506 parcels.No alteration has been made to the spatial geometry of the data.Fields that are associated with CAMA data were provided by towns.The data fields that have information from the CAMA were sourced from the towns’ CAMA data.If no field for the parcels was provided for linking back to the CAMA by the town a new field within the original data was selected if it had a match rate above 50%, that joined back to the CAMA.Linking fields were renamed to "Link".All linking fields had a census town code added to the beginning of the value to create a unique identifier per town.Any field that was not town name, Location, Editor, Edit Date, or a field associated back to the CAMA, was not used in the creation of this Dataset.Only the fields related to town name, location, editor, edit date, and link fields associated with the towns’ CAMA were included in the creation of this dataset. Any other field provided in the original data was deleted or not used.Field names for town (Muni, Municipality) were renamed to "Town Name".

Data and Resources

Field Value
accessLevel public
catalog_@context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
catalog_@id https://data.ct.gov/data.json
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
catalog_describedBy https://project-open-data.cio.gov/v1.1/schema/catalog.json
identifier https://www.arcgis.com/home/item.html?id=b8d8b38c83c74a23a6595cfb7d4c839b&sublayer=0
issued 2024-02-15
landingPage https://geodata.ct.gov/datasets/ctmaps::connecticut-state-parcel-layer-2023
license https://creativecommons.org/publicdomain/zero/1.0
metadata_type geospatial
modified 2025-05-01
old-spatial -73.7278,40.9807,-71.7874,42.0506
publisher State of Connecticut
resource-type Dataset
source_datajson_identifier true
source_hash 0dd0754da50d6d29720ca460f70d67676f497d4371165ad45e145b7b694d48ba
source_schema_version 1.1
spatial {"type": "Polygon", "coordinates": [[[-73.7278, 40.9807], [-73.7278, 42.0506], [-71.7874, 42.0506], [-71.7874, 40.9807], [-73.7278, 40.9807]]]}
theme {geospatial}
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • AmeriGEO
  • AmeriGEOSS
  • CKAN
  • GEO
  • GEOSS
  • National
  • North America
  • United States
  • boundaries
  • cadastre
  • cama
  • ct-cama
  • ct-cama-2023
  • ct-gis
  • ct-gis-office
  • ct-parcels
  • ct-parcels-2023
  • gis
  • parcel-boundaries
  • parcels
  • planning-cadastre
  • tax-parcels
isopen True
license_id cc-zero
license_title Creative Commons CCZero
license_url http://www.opendefinition.org/licenses/cc-zero
maintainer EsriPS_CT6
maintainer_email opm.giso@ct.gov
metadata_created 2025-09-24T17:02:00.517013
metadata_modified 2025-09-24T17:02:00.517023
notes <div style='text-align:Left; font-size:12pt;'><p style='font-size:16ptmargin:16 0 16 0;'><span><span>The dataset has combined the Parcels and Computer-Assisted Mass Appraisal (CAMA) data for 2023 into a single dataset. This dataset is designed to make it easier for stakeholders and the GIS community to use and access the information as a geospatial dataset. Included in this dataset are geometries for all 169 municipalities and attribution from the CAMA data for all but one municipality. Pursuant to Section 7-100l of the Connecticut General Statutes, each municipality is required to transmit a digital parcel file and an accompanying assessor’s database file (known as a CAMA report), to its respective regional council of governments (COG) by May 1 annually. </span></span></p><p style='font-size:16ptmargin:16 0 16 0;'><span><span>These data were gathered from the CT municipalities by the COGs and then submitted to CT OPM. This dataset was created on 12/08/2023 from data collected in 2022-2023. Data was processed using Python scripts and ArcGIS Pro, ensuring standardization and integration of the data.</span></span></p><p style='font-size:16ptmargin:16 0 16 0;'><span style='font-weight:bold;'><span>CAMA Notes:</span></span></p><p style='font-size:16ptmargin:16 0 16 0;'><span><span>The CAMA underwent several steps to standardize and consolidate the information. Python scripts were used to concatenate fields and create a unique identifier for each entry. The resulting dataset contains 1,353,595 entries and information on property assessments and other relevant attributes.</span></span></p><ul><li><p style='font-size:16ptmargin:4 0 7 0;'><span><span>CAMA was provided by the towns.</span></span></p></li><li><p style='font-size:16ptmargin:4 0 7 0;'><span><span>Canaan parcels are viewable, but no additional information is available since no CAMA data was submitted.</span></span></p></li></ul><p style='font-size:16ptmargin:16 0 16 0;'><span style='font-weight:bold;'><span>Spatial Data Notes:</span></span></p><p style='font-size:16ptmargin:16 0 16 0;'><span><span>Data processing involved merging the parcels from different municipalities using ArcGIS Pro and Python. The resulting dataset contains 1,247,506 parcels.</span></span></p><ul><li><p style='font-size:16ptmargin:4 0 7 0;'><span><span>No alteration has been made to the spatial geometry of the data.</span></span></p></li><li><p style='font-size:16ptmargin:4 0 7 0;'><span><span>Fields that are associated with CAMA data were provided by towns.</span></span></p></li><li><p style='font-size:16ptmargin:4 0 7 0;'><span><span>The data fields that have information from the CAMA were sourced from the towns’ CAMA data.</span></span></p></li><li><p style='font-size:16ptmargin:4 0 7 0;'><span><span>If no field for the parcels was provided for linking back to the CAMA by the town a new field within the original data was selected if it had a match rate above 50%, that joined back to the CAMA.</span></span></p></li><li><p style='font-size:16ptmargin:4 0 7 0;'><span><span>Linking fields were renamed to &quot;Link&quot;.</span></span></p></li><li><p style='font-size:16ptmargin:4 0 7 0;'><span><span>All linking fields had a census town code added to the beginning of the value to create a unique identifier per town.</span></span></p></li><li><p style='font-size:16ptmargin:4 0 7 0;'><span><span>Any field that was not town name, Location, Editor, Edit Date, or a field associated back to the CAMA, was not used in the creation of this Dataset.</span></span></p></li><li><p style='font-size:16ptmargin:4 0 7 0;'><span><span>Only the fields related to town name, location, editor, edit date, and link fields associated with the towns’ CAMA were included in the creation of this dataset. Any other field provided in the original data was deleted or not used.</span></span></p></li><li><p style='font-size:16ptmargin:4 0 7 0;'><span><span>Field names for town (Muni, Municipality) were renamed to &quot;Town Name&quot;.
num_resources 11
num_tags 22
title Connecticut State Parcel Layer 2023