20230913 09554200 1.0 FGDC CSDGM Metadata FALSE CriticalAreaBuffer2023 002 Projected GCS_North_American_1983 Linear Unit: Foot_US (0.304801) NAD_1983_StatePlane_Maryland_FIPS_1900_Feet <ProjectedCoordinateSystem xsi:type='typens:ProjectedCoordinateSystem' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xs='http://www.w3.org/2001/XMLSchema' xmlns:typens='http://www.esri.com/schemas/ArcGIS/10.8'><WKT>PROJCS[&quot;NAD_1983_StatePlane_Maryland_FIPS_1900_Feet&quot;,GEOGCS[&quot;GCS_North_American_1983&quot;,DATUM[&quot;D_North_American_1983&quot;,SPHEROID[&quot;GRS_1980&quot;,6378137.0,298.257222101]],PRIMEM[&quot;Greenwich&quot;,0.0],UNIT[&quot;Degree&quot;,0.0174532925199433]],PROJECTION[&quot;Lambert_Conformal_Conic&quot;],PARAMETER[&quot;False_Easting&quot;,1312333.333333333],PARAMETER[&quot;False_Northing&quot;,0.0],PARAMETER[&quot;Central_Meridian&quot;,-77.0],PARAMETER[&quot;Standard_Parallel_1&quot;,38.3],PARAMETER[&quot;Standard_Parallel_2&quot;,39.45],PARAMETER[&quot;Latitude_Of_Origin&quot;,37.66666666666666],UNIT[&quot;Foot_US&quot;,0.3048006096012192],AUTHORITY[&quot;EPSG&quot;,2248]]</WKT><XOrigin>-120561100</XOrigin><YOrigin>-95444400</YOrigin><XYScale>3048.0060960121928</XYScale><ZOrigin>0</ZOrigin><ZScale>1</ZScale><MOrigin>0</MOrigin><MScale>1</MScale><XYTolerance>0.0032808333333333331</XYTolerance><ZTolerance>2</ZTolerance><MTolerance>2</MTolerance><HighPrecision>true</HighPrecision><WKID>102685</WKID><LatestWKID>2248</LatestWKID></ProjectedCoordinateSystem> 20230919 14094800 20230919 14094800 150000000 5000 NAP Version 6.2 (Build 9200) ; Esri ArcGIS 10.9.1.28388 sl_wls Ryan Mello ESRGC 212 W. Main St. Salisbury MD 21801 rgmello@salisbury.edu 410-677-6744 The purpose of the Chesapeake Bay Critical Area (CBCA) Remapping effort is to provide an updated critical area map for the Counties of Maryland. <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>Shoreline is defined as a combination of the intersection of water and land as interpreted from the 2011 (6-inch resolution, 100 scale) true-color orthophotography, and several guidelines for estimating high-tide limit. </SPAN></P><P><SPAN>Wetlands defined as landward edge of tidal wetlands interpreted from 2011 CIR image and checked against topographic data.</SPAN></P><P><SPAN /></P><P><SPAN /></P><P><SPAN /></P></DIV></DIV></DIV> The remapping of Maryland's Critical Area has been a collaboration of the Critical Area Commission, Maryland Department of Natural Resources, Maryland Department of Information Technology, Harford County, and ESRGC at Salisbury University. Critical Area Chesapeake Bay Harford County Maryland <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>Contact County representatives prior to using this data.</SPAN></P><P><SPAN /></P><P><SPAN /></P></DIV></DIV></DIV> Feature Class dataset EPSG 5.3(9.0.0) 0 Simple FALSE 0 TRUE FALSE CriticalAreaBuffer2023 Feature Class 0 OBJECTID OBJECTID OID 4 10 0 Internal feature number. Esri Sequential unique whole numbers that are automatically generated. FID_sl_wls_100_ft_buffer_clip_p FID_sl_wls_100_ft_buffer_clip_polygon_erase Integer 4 10 0 Shape Shape Geometry 8 0 0 Feature geometry. Esri Coordinates defining the features. ORIGIN ORIGIN String 10 0 0 BUFF_DIST BUFF_DIST Double 8 38 8 FID_buffmaster_2019_updatedApri FID_buffmaster_2019_updatedApril262022 Integer 4 10 0 ORIG_FID ORIG_FID Integer 4 10 0 TAG TAG String 32 0 0 Shape.STArea() Shape.STArea() Double 0 0 0 Shape.STLength() Shape.STLength() Double 0 0 0 20230919 The shoreline and wetlands datasets were digitized at a working scale of 1:1200. Maximum scale used during the digitizing process was 1:600. Horizontal accuracy of the shoreline is directly dependent upon the accuracy of the source layers. Digitized the shoreline using 2011 true-color orthophotography primarily. When necessary 2011 CIR or 2007 true-color orthophotography was used. • Barren land limit determined by: Presence of vegetation, Edge of wettest land, Presence of boats/docks (take midway point between water’s edge and fast land) • Mud flats left on water edge of shoreline, with the assumption that they would be inundated by water at high tide • Presence of bulkhead supersedes revetment (rip-rap, rock piling, etc) as shoreline boundary and the top of the bulkhead will be digitized as shoreline • Bulk heads and revetments are fast land and serve as water edge of shoreline. In the case of revetments, the toe of the revetment will be digitized as shoreline unless a high water mark is present, in which case the high water mark will be captured as shoreline. • Perpendicular groins and jetties will not be included in shoreline unless they are mapped as shoreline on 72 wetland maps or are greater than 10 meters wide. • Tombolas will not be included in shoreline • Parallel groins will not be included in shoreline • Exclude bridges or roads that intersect shoreline Other consideration made while capturing the shoreline were: • Digitizing scale took place at a minimum of 1:1200 (max of 1:600 used for inspection) • 1972 Wetlands maps provided the extent to which rivers were digitized • Docks greater than 20 meters wide were treated as shoreline • Digitizing of polygon water features ends where the feature visually becomes a line • Consideration was given to tree canopy and shadows • When faced with doubt about whether or not shoreline runs under a structure, error on the side the landward edge and intersect at 90 degrees (flag area for review by local representatives) Digitized wetlands using 2011 color infrared ortho-imagery and collateral datasets including LiDAR, contours, 1972 wetland maps, and DNR wetland maps. • Digitizing scale took place at a minimum of 1:1200 (max of 1:600 used for inspection) • Landward edge of tidal wetlands (persistent emergent wetlands/scrub-shrub) interpreted from 2011 CIR image and checked against topographic data • Wetland determinations were checked against rectified 1972 Wetland Maps • Areas of disturbed wetlands will be reviewed and permits will be checks • Collateral datasets were used to aid in interpretation including soils, DRGs, LiDAR, and true-color imagery • Review point created for instances where there is a significant difference between ESRGC interpretation and 72 wetland maps (decision to be made by CAC) and to indicate where wetlands have been delineated and were not on 72 maps • Flag areas of wetland that appear to be mowed/disturbed • Wetlands that occur in front of a revetment will be digitized as wetland • Lines smoothed by .01 • Capture uplands within wetlands (in wetland feature class) that are mapped in 72 wetland maps AND are greater than 1 acre.