20240529
14480100
1.0
FALSE
Biospatial_SaltmarshExtents_Nrth20240529
002
Projected
GCS_NZGD_2000
Linear Unit: Meter (1.000000)
NZGD_2000_New_Zealand_Transverse_Mercator
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20240529
17341400
20240530
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150000000
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ItemDescription
Esri ArcGIS 13.1.0.41833
Biospatial_SaltmarshExtents_Nrth20240529
Saltmarsh
Northland
Saline Influence
Machine learning
This machine learning dataset predicts the extent of Saltmarsh along the Northland coastline. Coastline used to delineate the extent of this data is the Biospatial_SalineInfluenceExtent_Northland.
<DIV STYLE="text-align:Left;"><DIV><DIV><UL><LI><P><SPAN>Saltmarsh was mapped using a combination of LiDAR (2018) and RGBI (2014-2016) imagery captured by Northland and Auckland Councils. </SPAN></P></LI><LI><P><SPAN>Data was derived using a combination of machine learning model training and manual output validation. </SPAN></P></LI><LI><P><SPAN>Saltmarsh was validated using a combination of Photoblique and GIS desktop surveys. </SPAN></P></LI><LI><P><SPAN>Slope, Spectral signatures, Topographic wetness index and vegetation structure were inputs into the machine learning model. </SPAN></P></LI><LI><P><SPAN>Data is presented using a polygon approach for ease of display. </SPAN></P></LI><LI><P><SPAN>Elevation data has been attached for data overlay in Photoblique. </SPAN></P></LI></UL><P><SPAN>Data Limitations: </SPAN></P><UL><LI><P><SPAN>Data has a high accuracy rate but may be subject to some false positive and/or false negative results. </SPAN></P></LI><LI><P><SPAN>The spatial extents can be used as a guide for where saltmarsh exists </SPAN></P></LI><LI><P><SPAN>Scale is created to a 1m resolution </SPAN></P></LI><LI><P><SPAN>Data is representation of the capture date of the imagery and LiDAR. </SPAN></P></LI></UL><P><SPAN>Version Date: 2024/05/29</SPAN></P></DIV></DIV></DIV>
Biospatial Limited Photoblique Limited  Auckland Council Northland Regional Council
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>Northland Regional Council and Biospatial Limited maintain ownership of the dataset. </SPAN></P></DIV></DIV></DIV>
File Geodatabase Feature Class
dataset
EPSG
6.15(9.0.0)
0
Simple
FALSE
0
TRUE
FALSE
Biospatial_SaltmarshExtents_Nrth20240529
Feature Class
0
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.
Value
Value
Double
8
0
0
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.
20240530