Wetlands and Watercourses Viewer

Name: Wetlands and Watercourses Viewer
Creator: State of Connecticut
Published: 2026-07-02T19:57:42+08:00

CT DEEP GIS Open Data Website2026-07-02 收录

湿地环境评估

土地开发规划

数据链接：

https://deepmaps.ct.gov/apps/ctmaps::wetlands-and-watercourses-viewer 数据链接链接失效反馈

官方服务：

资源简介：

<div style='background-color:rgb(255, 255, 255); color:rgb(0, 0, 0); font-family:"Segoe UI", "Segoe UI Web", Arial, Verdana, sans-serif; font-size:12px; font-style:normal; font-variant-caps:normal; font-variant-ligatures:normal; font-weight:400; letter-spacing:normal; margin:0px; padding:0px; text-align:start; text-decoration-color:initial; text-decoration-style:initial; text-indent:0px; text-transform:none; word-spacing:0px;'><div style='clear:both; margin:0px; overflow:visible; padding:0px;'>Overview </div><div style='clear:both; margin:0px; overflow:visible; padding:0px;'>This map displays wetland and watercourse areas at the parcel level across Connecticut. It offers a high‑level overview of where these wetlands and watercourses are located and the portion of each parcel they occupy, providing a helpful general reference. For those developing a Housing Growth Plan under <a style='color:inherit; margin:0px; padding:0px; text-decoration:none;' target='_blank' href='https://cga.ct.gov/2026/sup/chap_124b.htm' rel='nofollow ugc noopener noreferrer'>C.G.S. §§ 8-13bb and 8-13cc</a>, this map can help inform the Developable Land Inventory process, specifically the evaluation of the exclusion of wetlands and watercourses as outlined in the <a style='color:inherit; margin:0px; padding:0px; text-decoration:none;' target='_blank' href='https://ctgisoffice.github.io/dev-land-inv-guidance/' rel='nofollow ugc noopener noreferrer'>Developable Land Inventory Technical Guidance</a>. Note that a detailed GIS analysis should still be completed for that purpose, as this map is intended as an overview only. </div><div style='clear:both; margin:0px; overflow:visible; padding:0px;'>Definitions </div><div style='margin:0px; padding:0px;'><ul><li>Wetland and Watercourse Definitions: <a style='color:inherit; margin:0px; padding:0px; text-decoration:none;' target='_blank' href='https://portal.ct.gov/DEEP/Water/Inland-Wetlands/How-Are-Inland--Wetlands-and-Watercourses--Defined' rel='nofollow ugc noopener noreferrer'>Click here to view definitions</a> </li></ul></div><div style='margin:0px; padding:0px;'><ul><li>Inland Wetland Soils Area: The total area of Inland Wetland features (in acres), as defined by hydric soils in the <a style='color:inherit; margin:0px; padding:0px; text-decoration:none;' target='_blank' href='https://www.cga.ct.gov/current/pub/chap_440.htm#sec_22a-36' rel='nofollow ugc noopener noreferrer'>Inland Wetlands and Watercourse Act</a>, within the selected parcel  </li></ul></div><div style='margin:0px; padding:0px;'><ul><li>NHD Watercourse Area: The total area of Watercourse features (in acres) within the selected parcel  </li></ul></div><div style='margin:0px; padding:0px;'><ul><li>NWI Wetlands Area: The total area of NWI Wetland features (in acres) within the selected parcel </li></ul></div><div style='margin:0px; padding:0px;'><ul><li>Aggregate Area: The aggregate area of Inland Wetland Soils, NHD Watercourses, and NWI Wetlands* features (in acres) within the selected parcel. This metric only sums areas where Inland Wetland Soils, NHD Watercourses, and NWI Wetlands features overlap each other once. As such, the Aggregate Area can be less than the sum of the Inland Wetland Soils, NHD Watercourses, and NWI Wetlands Areas.  </li></ul><img style='width:20.56%;' src='https://ctmaps.maps.arcgis.com/sharing/rest/content/items/4ac3f386152249038a085efc3cdb2521/data' /> </div><div style='clear:both; margin:0px; overflow:visible; padding:0px;'>*If the NWI Wetlands layer is toggled off so that it is hidden in the map, NWI Wetlands areas are not calculated in the parcel pop-ups and are not included in the aggregate area calculations. </div><div style='clear:both; margin:0px; overflow:visible; padding:0px;'>Datasets  </div><div style='margin:0px; padding:0px;'><ul><li>NHD Watercourses: This layer displays hydrography polygon features from the USGS National Hydrography Dataset (NHD) within the state of Connecticut. The full dataset from which this layer is derived contains several waterbody categories; however, in this viewer it is filtered for open water features (Where AV_LEGEND = "Water"). This dataset is maintained by the <a style='color:inherit; margin:0px; padding:0px; text-decoration:none;' target='_blank' href='https://portal.ct.gov/DEEP' rel='nofollow ugc noopener noreferrer'>Connecticut Department of Energy and Environment</a> (CT DEEP). See <a style='color:inherit; margin:0px; padding:0px; text-decoration:none;' target='_blank' href='https://geodata.ct.gov/maps/ef85cf0c55394065a8a74ea97fbd7ede/about' rel='nofollow ugc noopener noreferrer'>Connecticut Hydrography Set</a> for more details. </li></ul></div><div style='margin:0px; padding:0px;'><ul><li>Inland Wetland Soils: This dataset contains statutorily defined Inland Wetland Soils Areas (See <a style='color:inherit; margin:0px; padding:0px; text-decoration:none;' target='_blank' href='https://www.cga.ct.gov/current/pub/chap_440.htm#sec_22a-36' rel='nofollow ugc noopener noreferrer'>Inland Wetlands and Watercourse Act</a>) and is maintained by CT DEEP. See <a style='color:inherit; margin:0px; padding:0px; text-decoration:none;' target='_blank' href='https://geodata.ct.gov/datasets/CTDEEP::soils-inland-wetland/about' rel='nofollow ugc noopener noreferrer'>Inland Wetland Soils</a> for more details. </li></ul></div><div style='margin:0px; padding:0px;'><ul><li>NWI Wetlands: This dataset contains wetland features from the 2024 United State Fish and Wildlife Service <a style='color:inherit; margin:0px; padding:0px; text-decoration:none;' target='_blank' href='https://www.fws.gov/program/national-wetlands-inventory' rel='nofollow ugc noopener noreferrer'>National Wetlands Inventory (NWI)</a> clipped to the Connecticut state boundary. This clipped version of the national dataset is maintained by the CT DEEP. The federally classified wetland features contained in this dataset may differ from the Connecticut statutory definition, which is based on hydric soils, but can serve as a useful supplemental reference when analyzing wetland coverage.  </li></ul></div><div style='clear:both; margin:0px; overflow:visible; padding:0px;'>Instructions </div></div><div style='background-color:rgb(255, 255, 255); clear:both; color:rgb(0, 0, 0); font-family:"Segoe UI", "Segoe UI Web", Arial, Verdana, sans-serif; font-size:12px; font-style:normal; font-variant-caps:normal; font-variant-ligatures:normal; font-weight:400; letter-spacing:normal; margin:0px; overflow:visible; padding:0px; text-align:start; text-decoration-color:initial; text-decoration-style:initial; text-indent:0px; text-transform:none; word-spacing:0px;'>To review parcel wetland and watercourse areas, zoom to your target area. The NHD Watercourses, Inland Wetland Soils, and NWI Wetlands layers will appear when the map is zoomed in past a zoom scale of less than 1:289,000. The Parcel layer will appear when the map is zoomed in past a zoom scale of less than 1:36,000. Click on a parcel to view the Inland Wetland and Watercourse areas (in acres) that fall within the parcel. Use the filters in the top right header bar to query the map by Municipality or Council of Government (COG). Use the filter in the top right of the map to toggle the NWI Wetlands layer on or off. <div style='border-top:1px dotted rgb(154, 192, 205); height:1px; margin:5px 0px 0px -12px; padding:0px; width:8px;'> </div><div style='background-color:rgb(221, 227, 236); border:1px solid rgb(138, 162, 191); height:16px; margin:0px 0px 0px -28px; overflow:hidden; padding:0px; width:16px;'><img style='border-image:initial; border:medium none currentcolor; height:auto; margin:0px; padding:0px; width:auto;' src='https://res-gcch.cdn.office.net/officeonline/hashed/83987e0f63d43f20/we_version2.png' alt='Paragraph locked by Hurley, Sarah' /></div></div>

提供机构：

State of Connecticut

Wetlands and Watercourses Viewer

资源简介：

相关数据集