@prefix dcat: <http://www.w3.org/ns/dcat#> .
@prefix dct: <http://purl.org/dc/terms/> .
@prefix foaf: <http://xmlns.com/foaf/0.1/> .
@prefix gsp: <http://www.opengis.net/ont/geosparql#> .
@prefix locn: <http://www.w3.org/ns/locn#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

<https://data.amerigeoss.org/dataset/7400809e-2a39-4def-96d1-0ee2dce072d4> a dcat:Dataset ;
    dct:description "Multi-spectral digital orthophotography was produced at a scale of 1:2400 (1 in = 200 ft) with a 12 inch pixel resolution for the DVRPC - PA project area. Digital orthophotography combines the image characteristics of a photograph with the geometric qualities of a map. Orthophoto data is produced through the use of digitized perspective aerial photographs or other remotely sensed image data. This data is processed into a digital product that has been rectified for camera lens distortion, vertical displacement caused by terrain relief, and variations in aircraft altitude and orientation. Acquisition information, processing, accuracies, etc. apply only to the data collected under Task Order G15PD00279. The information reported does not include imagery acquired and produced by the US Army Corps of Engineers (USACE) and AXIS Geospatial. However, tile counts and boundary coordinates include the USACE imagery. This dataset consists of uncompressed, ortho photo tiles formatted as 16-bit, 4-band (RGB and NIR) GeoTIFF images with TIF world files. A total of 1,540 tiles were produced in PA State Plane South Zone, US Survey feet; tile size is 8,745 ft x 5,022 ft and uses the DVRPC PA index. The Microsoft UltraCam Falcon and Eagle large format digital camera was used to capture 4-band (RGB and NIR), 16-bit imagery at a Nominal Acquisition Altitude of 16,480' (AGL) during the Spring of 2015 on the following flight dates: Apr 2, 2015-A (N170TA; 50811038) Apr 2, 2015-A (N344Q; 40312131) Apr 18, 2015-A (N170TA; 50811038) Maximum and mean differential baseline lengths were not generated for the DVRPC/LVPC/NJ/YCPC orthoimagery project due to the use of Applanix SmartBase software used to process and compute atmospheric errors within a specified GNSS multi-base network. SmartBase processing offers a number of significant benefits including: The distance to the nearest reference station can be extended well beyond 30 km. The time to fix integer ambiguities is significantly reduced. The overall reliability of fixing integer ambiguities is increased. No special processing is required in the RTK engine, as it is the case for a centralized multi-base approach. Due to the complexity of the typical reference station network used in SmartBase processing, determining maximum and mean differential baseline lengths is not feasible for this project. For the 12 inch GSD Ortho image, horizontal positional accuracy was designed not to exceed 4 feet NSSDA 95% confidence." ;
    dct:identifier "7400809e-2a39-4def-96d1-0ee2dce072d4" ;
    dct:issued "2025-11-22T17:06:49.135235"^^xsd:dateTime ;
    dct:modified "2025-11-22T17:06:49.135239"^^xsd:dateTime ;
    dct:publisher <https://data.amerigeoss.org/organization/727dbdd5-3f98-4ac0-9d28-5e344558139b> ;
    dct:spatial [ a dct:Location ;
            locn:geometry "POLYGON ((-76.1632 39.7148, -74.7117 39.7148, -74.7117 40.6206, -76.1632 40.6206, -76.1632 39.7148))"^^gsp:wktLiteral ] ;
    dct:title "USGS High Resolution Orthoimages for DVRPC-PA" ;
    dcat:keyword "12-inch-orthoimage",
        "amerigeo",
        "amerigeoss",
        "ckan",
        "geo",
        "geoss",
        "image-map",
        "national",
        "natural-color-orthophoto",
        "north-america",
        "orthoimage",
        "orthophoto",
        "rectified-image",
        "rectified-photograph",
        "united-states",
        "us" .

<https://data.amerigeoss.org/organization/727dbdd5-3f98-4ac0-9d28-5e344558139b> a foaf:Agent ;
    foaf:name "US Migrating" .