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ks_nhfv2_hexagons_webmercator
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Projected
GCS_WGS_1984
Linear Unit: Meter (1.000000)
WGS_1984_Web_Mercator_Auxiliary_Sphere
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20220222
19365600
20220222
19365600
Mike Houts
Kansas Applied Remote Sensing, Kansas Biological Survey at the University of Kansas
785-864-1515
Higuchi Hall
2101 Constant Avenue
Lawrence
Kansas
66047-3759
US
mhouts@ku.edu
20220222
ArcGIS Metadata
1.0
ks_nhfv2_hexagons_webmercator
2019-11-01
Mike Houts, Kansas Applied Remote Sensing, Kansas Biological Survey at the University of Kansas
vector digital data
In an effort to integrate information from a wide range of data sets into a single spatially referenced grid that can be used as an annotated spatial index of data layers, facilitate data discovery, and enhance research, personnel at the Kansas Biological Survey at the University of Kansas developed the Nested Hexagon Framework (NHFv2). The NHFv2 is comprised of four nested spatial scale mapping units (1 km2 Hexagons, 7 km2 Cogs, 49 km2 Wheels, and 343 km2 Rings) and currently covers all of North and Central America, with the potential to be expanded to other global extents due to its unique hierarchical number system and spatial tiling based around 5 degree by 5 degree latitude and longitude tiles. Data can be referenced to any of the spatial scales (hex, cog, wheel, ring) depending on the spatial precision and/or sensitivity of the data. The NHFv2 allows for the sharing of information without revealing the raw spatial data or precise spatial locations so that users can quickly get a summary of the features and conditions present in a given cell. The original version of the NHF had a similar nested structure, but was based around mapping cells using miles instead of kilometers. To be better suited for scientific integration and international applications, the process framework was rebuilt around a one square kilometer hexagon grid and renamed as NHFv2 to keep it distinct.
The Nested Hexagon Framework is a response to the need for a spatial database to reference and summarize a wide range of datasets to help with data discovery and provide a more comprehensive (cross disciplinary) assessments of what characteristics are present at a given area. The NHFv2 will help inform preliminary site planning, environmental reviews, research endeavors, and making datasets more discoverable to all users. The comprehensive nature of the datasets to be integrated and the subsequent ability to discover and share information not typically linked together is a unique and great opportunity to contribute to information sharing. Any dataset that has a spatial location (species observations, rainfall totals, fossil collection sites, wind farms, climate change predictions, and human population/demographics) can all be summarized and referenced using the NHFv2. Even sensitive research data that can’t be shared (but could contribute to knowledge-base/decisions) can be summarized and made available using the Framework while the raw data stays secure. As a spatial index, the NHFv2 can 1) provide information on what datasets are available for a given area, 2) allow users to search the database for the location/extent of certain datasets or attributes, 3) facilitate the discovery of new datasets, 4) provide a mechanism for researchers and data collectors/managers to make their data more discoverable. The NHFv2 helps make data discoverable and information available.
Kansas Applied Remote Sensing Kansas Biological Survey at the University of Kansas Higuchi Hall 2101 Constant Avenue Lawrence, KS 66047-3759 kars.ku.edu
Mike Houts
Kansas Applied Remote Sensing, Kansas Biological Survey at the University of Kansas
785-864-1515
Higuchi Hall
2101 Constant Avenue
Lawrence
Kansas
66047-3759
US
mhouts@ku.edu
environment
biota
inlandWaters
ISO 19115 Topic Categories
Framework
NHFv2
NHF
Hexagons
environment
Framework
biota
NHFv2
NHF
inlandWaters
Hexagons
Version 6.2 (Build 9200) ; Esri ArcGIS 10.9.1.28388
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38.451911
46.538779
1
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51.278230
38.722543
0
ks_nhfv2_hexagons_webmercator
Feature Class
0
OBJECTID
Internal feature number.
Esri
Sequential unique whole numbers that are automatically generated.
objectid
OID
4
10
0
Shape
Feature geometry.
Esri
Coordinates defining the features.
shape
Geometry
4
0
0
hexagon_id
Within each cog, seven hexagons (1-square kilometer each) are numbered beginning with the center hexagon (being hexagon id 1) and then clockwise based upon their center points beginning at the hexagon with the smallest degree angle from the cog center point with zero degrees being directly north. IDs are comprised of all preceding ids with the form [grid id]-[ring id]-[wheel id]-[cog id]-[hexagon id] (ie 105W-40N-061-1-7-4).
hexagon_id
String
18
0
0
cog_id
Within each wheel, seven cogs (7-square kilometers each) are numbered beginning with the center cog (being cog id 1) and then clockwise based upon their center points beginning at the cog with the smallest degree angle from the wheel center point with zero degrees being directly north. IDs are comprised of all preceding ids with the form [grid id]-[ring id]-[wheel id]-[cog id] (ie 105W-40N-061-1-7).
cog_id
String
16
0
0
grid_id
The framework’s highest level is a five degree latitude by five degree longitude grid with the grid ID referencing the northwest coordinates of the grid (i.e. 105W-40N). As new areas for the NHF are identified, the nested grid can be created by adding new 5x5 degree tiles. This grouping is used only for data tiling and no data can be submitted at this level.
grid_id
String
8
0
0
ring_id
The highest functional spatial data level of the framework is the 343-squre kilometer ring. The grid ID of the ring is determined by the intersection of the center point of the ring and the underlying grid cell. Numbering of the rings within the grid cell begin at the northern most ring and progress to the west, padded to three digits (ie 001).
ring_id
String
12
0
0
wheel_id
Within each ring, seven wheels (49-square kilometers each) are numbered beginning with the center wheel (being wheel id 1) and then clockwise based upon their center points beginning at the wheel with the smallest degree angle from the ring center point with zero degrees being directly north. IDs are comprised of all preceding ids with the form [grid id]-[ring id]-[wheel id] (ie 105W-40N-061-1).
wheel_id
String
14
0
0
st_area(shape)
st_area(shape)
Double
0
0
0
st_length(shape)
st_length(shape)
Double
0
0
0
Feature Class
dataset
EPSG
6.18.3(9.3.1.2)
Simple
FALSE
0
TRUE
FALSE