20220311
17431000
1.0
FALSE
IrrigatedAreas
002
-8433699.805400
-8358449.423000
4641092.257700
4818286.948900
1
Projected
GCS_WGS_1984
Linear Unit: Meter (1.000000)
WGS_1984_Web_Mercator_Auxiliary_Sphere
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20220114
14264500
20220211
11114400
150000000
5000
FGDC
Sharon Ungerer
Delaware Department of Natural Resources and Environmental Control
GIS Specialist
302-739-9945
89 Kings Hwy
Dover
Delaware
19901
20220211
ArcGIS Metadata
1.0
Irrigated Areas
Kevin Brinson, Center for Environmental Monitoring and Analysis, Associate State Climatologist and DEOS Director
vector digital data
2021-07-06T00:00:00
Delaware Department of Natural Resources and Environmental Control (DNREC)
The Richards and Robbins Building | Dover, DE 19901
Center for Environmental Monitoring & Analysis (CEMA);
Department of Geography & Spatial Sciences
University of Delaware | Newark, DE 19716-2541
Pivot Areas
Pivots
irrigated areas
crop circles
UD
USGS
DNREC
Pivot Areas
Pivots
irrigated areas
crop circles
UD
DNREC
Esri ArcGIS 12.4.2.19948
Digitized fields of irrigated areas in Delaware.
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN STYLE="font-style:italic;">The Irrigated Areas polygon feature class is the result of a collaborative mapping effort by the University of Delaware (UD) and Delaware Department of Natural Resources and Environmental Control (DNREC). Irrigated Areas is a baseline of irrigated fields in Delaware that DNREC will continue to build on as new well permits are issued for irrigation systems. </SPAN></P></DIV></DIV></DIV>
75
75.8
38.45
39.8
2969
File Geodatabase Feature Class
dataset
EPSG
6.18.3(9.3.1.2)
Simple
FALSE
2969
TRUE
FALSE
IrrigatedAreas
Feature Class
2969
OBJECTID
OBJECTID
OID
4
0
0
Internal feature number.
Esri
Sequential unique whole numbers that are automatically generated.
Shape
SHAPE
Geometry
0
0
0
Feature geometry.
Esri
Coordinates defining the features.
Shape_Length
Shape_Length
Double
8
0
0
Length of feature in internal units.
Esri
Positive real numbers that are automatically generated.
Shape_Area
Shape_Area
Double
8
0
0
Area of feature in internal units squared.
Esri
Positive real numbers that are automatically generated.
IrrigatedAcres
Irrigated Acres
Double
8
0
0
Area of polygon in acres.
Sharon Ungerer
SourcePolygon
Source Polygon
String
255
0
0
Source of the polygon coverage included in this dataset. Digitization of polygons with sources listed as "...\IrrigationETPrj_forDNREC.gdb, Irrigation2018Merge feature class" and "...\IrrigationETPrj_forDNREC.gdb, Irrigation2011_GcsWgs84V feature class" was completed by University of Delaware Agricultural Extension or DNREC staff in Google Earth. Data was corrected by UD CEMA and Tracy DeLiberty in 2021 for the Development of a Crop Water Demand Model for Delaware Irrigated Farmland report submitted on July 6, 2021. -- Brinson, K. DeLiberty, T. Leathers, D. Development of a Crop Water Demand Model for Delaware Irrigated Farmland (6 Jul 2021). Center for Environmental Monitoring and Analysis, University of Delaware. Digitization of polygons with "Center Pivot Irrigation" next to entity are from previous irrigated areas coverage developed by U.S. Geological Survey and University of Delaware Agricultural Extension. See https://doi.org/10.3133/ds932 for more information.
Sharon Ungerer
The Irrigated Areas polygon feature class is the result of a collaborative mapping effort by the University of Delaware (UD) and Delaware Department of Natural Resources and Environmental Control (DNREC). Irrigated Areas is a baseline of irrigated fields in Delaware that DNREC will continue to build on as new well permits are issued for irrigation systems. James Adkins (UD) created the two coverages one from 2011 and another from 2018. The 2011 dataset aligns with the fields used in the Northern Atlantic Coastal Plain research by U.S. Geological Survey, University of Delaware Agricultural Extension that was previously available on FirstMap as the Center Pivot Irrigation layer (see https://pubs.usgs.gov/ds/0932/report.html for more information). The 2018 dataset added new irrigated fields and any irrigated fields that replaced older fields. The 2018 dataset had two types of geometry - lines and polygons. For irrigated fields that were circle shaped (i.e., crop circles), a polygon was created. If the fields were "pies" or corners of fields then lines and arcs were used to create the shape. In Sussex, irrigated areas not perfectly circular or pie-shape (i.e. drip irrigation fields) were shaped as polygons. However, perfect circles in Sussex were lines. In New Castle County and Kent all areas were lines. Google Earth was used to digitize the shapes. James Adkins shared this data with Tracy DeLiberty (UD) for processing. Updates were made by Tracy DeLiberty in ArcGIS desktop software and QGIS to account for overlapping fields and create uniform geometry of irrigated areas throughout Delaware. If a 2018 field overlapped 50% (or more) of an older field, then the 2018 field is a replacement was used and the 2011 field removed. Finally, Sharon Ungerer (DNREC) combined both updated polygons from 2018 and 2011. Sharon Ungerer removed all attributes except those that will be maintained by DNREC moving forward. Sharon Ungerer and other DNREC staff working in the Water Allocations program will continue to digitize fields and maintain the Irrigated Areas coverage.