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High FSII Fragmentation Layers
dataset
posted on 2020-03-03, 02:23 authored by Patrick JantzPatrick Jantz, Andrew HansenAndrew Hansen, Annie VirnigAnnie Virnig, Scott AtkinsonScott Atkinson----
Author: Patrick Jantz
Contact: Patrick.Jantz@nau.edu
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The FSII Spatial Morphology Database 1.0 was derived from the Forest Structural Integrity Index (FSII) database published in Hansen, A. et al. Global humid tropics forest structural condition and forest structural integrity maps.
Scientific Data 6, 232, doi:10.1038/s41597-019-0214-3 (2019).
The FSII forest layer was thresholded using a value of 14 to create a binary layer of high integrity/not high integrity forest.This layer was then used as an input to a morphological spatial pattern analysis (MSPA) to create high FSII forest fragmentation maps under different scenarios of edge effect distance and minimum fragmenting patch size. Water and ecoregion boundary edges were considered non-fragmenting.
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Directory Structure and Naming Convention
The directories fsii_samer_mspa, fsii_africa_mspa, fsii_asia_mspa, contain fragmentation layers for the Americas, Africa, and Asia, respectively. The reference year for each fragmentation layer is 2013. Layers are divided into 1000km x 1000km tiles to reduce maximum file size. The tiles within each directory are edge matched to facilitate mosaic operations.
The file naming convention is as follows:
[region]_mspa_[edge depth]_[fsii threshold]_[deforested patch size threshold]_[tile number].tif
region - one of either sa, af, or as corresponding to South America, Africa, and Asia, respectively
tile number - tile identification number, ranges from 0 to N, where N varies by region
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Each region has its own custom sinusoidal projection to minimize distortion.
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MSPA classifies each pixel of a forest/non-forest map into one of several classes.
• Edge – pixels comprising the interface between core high fsii forest and the surrounding landscape.
• Core forest – any high fsii forest pixel that is more than a certain distance from an edge.
• Perforation – pixels next to internal gaps in core high fsii forest.
• Core connectors – not large enough to be considered core but still connected to core. Core connectors are composed of two sub-types:
• Bridge - a mosaic of high fsii forest that connects different core areas.
• Loop - a mosaic of high fsii forest connecting a core area to itself.
• Branch - clumps of high fsii forest extending from core into areas of non-high fsii forest.
• Isolated patches – small, isolated patches of high fsii forest.
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Morphological Spatial Pattern Analysis (MSPA) Class codes
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Original Classification
1 - Branch
3 - Edge
5 - Perforation
9 - Islet
17 - Core
33 - Bridge
35 - Bridge in Edge
37 - Bridge in Perforation
65 - Loop
67 - Loop in Edge
69 - Loop in Perforation
129 - Missing
NoData - NoData
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Simplified to 7 Classes
1 - 1 - Branch
3 - 2 - Edge
5 - 3 - Perforation
9 - 4 - Islet
17 - 5 - Core
33 - 6 - Bridge
35 - 2 - Edge
37 - 3 - Perforation
65 - 7 - Loop
67 - 2 - Edge
69 - 3 - Perforation
129 - NoData
NoData - NoData
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Simplified to 5 Classes
1 - 1 - Matrix
3 - 2 - Edge
5 - 3 - Perforation
9 - 4 - Islet
17 - 5 - Core
33 - 1 - Matrix
35 - 1 - Matrix
37 - 1 - Matrix
65 - 1 - Matrix
67 - 1 - Matrix
69 - 1 - Matrix
129 - NoData
NoData - NoData
Author: Patrick Jantz
Contact: Patrick.Jantz@nau.edu
----
The FSII Spatial Morphology Database 1.0 was derived from the Forest Structural Integrity Index (FSII) database published in Hansen, A. et al. Global humid tropics forest structural condition and forest structural integrity maps.
Scientific Data 6, 232, doi:10.1038/s41597-019-0214-3 (2019).
The FSII forest layer was thresholded using a value of 14 to create a binary layer of high integrity/not high integrity forest.This layer was then used as an input to a morphological spatial pattern analysis (MSPA) to create high FSII forest fragmentation maps under different scenarios of edge effect distance and minimum fragmenting patch size. Water and ecoregion boundary edges were considered non-fragmenting.
----
Directory Structure and Naming Convention
The directories fsii_samer_mspa, fsii_africa_mspa, fsii_asia_mspa, contain fragmentation layers for the Americas, Africa, and Asia, respectively. The reference year for each fragmentation layer is 2013. Layers are divided into 1000km x 1000km tiles to reduce maximum file size. The tiles within each directory are edge matched to facilitate mosaic operations.
The file naming convention is as follows:
[region]_mspa_[edge depth]_[fsii threshold]_[deforested patch size threshold]_[tile number].tif
region - one of either sa, af, or as corresponding to South America, Africa, and Asia, respectively
edge depth - distance, in meters, over which edges are assumed to affect forest interior conditions, can be either 500 or 1000
fsii threshold - forest structural integrity index (fsii) threshold used to convert the continuous fsii layer to binary, 14 was used for this dataset
deforested patch size threshold - minimum size, in hectares, before a gap in high fsii forest is considered fragmenting, can be 0, 1, or 5tile number - tile identification number, ranges from 0 to N, where N varies by region
----
Each region has its own custom sinusoidal projection to minimize distortion.
----
MSPA classifies each pixel of a forest/non-forest map into one of several classes.
• Edge – pixels comprising the interface between core high fsii forest and the surrounding landscape.
• Core forest – any high fsii forest pixel that is more than a certain distance from an edge.
• Perforation – pixels next to internal gaps in core high fsii forest.
• Core connectors – not large enough to be considered core but still connected to core. Core connectors are composed of two sub-types:
• Bridge - a mosaic of high fsii forest that connects different core areas.
• Loop - a mosaic of high fsii forest connecting a core area to itself.
• Branch - clumps of high fsii forest extending from core into areas of non-high fsii forest.
• Isolated patches – small, isolated patches of high fsii forest.
----
Morphological Spatial Pattern Analysis (MSPA) Class codes
-----------------------
Original Classification
1 - Branch
3 - Edge
5 - Perforation
9 - Islet
17 - Core
33 - Bridge
35 - Bridge in Edge
37 - Bridge in Perforation
65 - Loop
67 - Loop in Edge
69 - Loop in Perforation
129 - Missing
NoData - NoData
-----------------------
Simplified to 7 Classes
1 - 1 - Branch
3 - 2 - Edge
5 - 3 - Perforation
9 - 4 - Islet
17 - 5 - Core
33 - 6 - Bridge
35 - 2 - Edge
37 - 3 - Perforation
65 - 7 - Loop
67 - 2 - Edge
69 - 3 - Perforation
129 - NoData
NoData - NoData
-----------------------
Simplified to 5 Classes
1 - 1 - Matrix
3 - 2 - Edge
5 - 3 - Perforation
9 - 4 - Islet
17 - 5 - Core
33 - 1 - Matrix
35 - 1 - Matrix
37 - 1 - Matrix
65 - 1 - Matrix
67 - 1 - Matrix
69 - 1 - Matrix
129 - NoData
NoData - NoData
