1.0 DCPLUS 20260421 17061000 20260421 17061000 https://www.arcgis.com/sharing/rest/content/items/301c0404657c43149e51eb1ca4bf7cdb/info/thumbnail/ago_downloaded.png https://www.arcgis.com/home/item.html?id=301c0404657c43149e51eb1ca4bf7cdb 301c0404657c43149e51eb1ca4bf7cdb Feature Service https://services5.arcgis.com/ilvOamkQCWQM5KB8/arcgis/rest/services/st_thomas_infrastructure_Harrison/FeatureServer st_thomas_infrastructure_Harrison boundaries Boundaries Coastline Digitized polygon features representing key infrastructure on St. Thomas, including parcels, buildings, parking lots, storage tanks, and the airport runway. -71.881 -71.096 42.055 41.127 1 <p>This polygon feature layer represents major infrastructure elements on the island of St. Thomas. The layer was created as part of an interactive digitizing workflow using the ArcGIS Online Web Editor. Each polygon was manually heads‑up digitized using aerial imagery and elevation data to support hazard assessment, infrastructure mapping, and spatial analysis.</p><p>The layer includes the following infrastructure types:</p><p>Parcels — General land‑use units and property footprints used to understand land ownership patterns and development areas.</p><p>Buildings — Structures digitized to support exposure analysis, damage estimation, and infrastructure inventory.</p><p>Parking Lots — Impervious surface areas associated with commercial, transportation, and tourism facilities.</p><p>Storage Tanks — Circular or rectangular tank structures, often associated with utilities or industrial facilities, digitized for risk and hazard evaluation.</p><p>Runway — The primary airport runway polygon at Cyril King Airport, used for elevation checks, flood exposure analysis, and transportation infrastructure mapping.</p><p>This feature layer supports the broader St. Thomas coastal risk assessment by providing detailed infrastructure geometry that can be compared against FEMA flood zones, elevation data, and other hazard layers. It is used in conjunction with point layers (airports, seaports), elevation points, and sea wall line features to build a comprehensive geospatial understanding of critical assets on the island.</p> 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301c0404657c43149e51eb1ca4bf7cdb https://services5.arcgis.com/ilvOamkQCWQM5KB8/arcgis/rest/services/st_thomas_infrastructure_Harrison/FeatureServer Feature Service EPSG