Services Directory Login

Final_Landscape_Diversity_with_lava_mask (Map Service)


View In:    ArcGIS JavaScript   ArcGIS.com   WMTS  

Current Version: 10.81

Service Description:
Landscape Diversity Score
The landscape diversity score is a representation of the diversity of local microclimate options due to enduring topographic options (landforms, elevation range) and available enduring wetness (wetland areas). In the landscape diversity metric, we wanted to augment or increase the basic landform variety score if wetland density or elevation range were above average and significantly higher than the landform variety score.  To do this we created and integrated two additional indices: 

Wetland Density Boost Area
We subtracted the landform variety score from the wetland density score such that a positive difference indicated the wetland density was greater than the landform variety relative to their respective means. We then identified areas where wetland density was both 1) above the mean (>0.5 SD) and 2) the difference between wetland density and landform variety was also above the mean (>0.5 SD). To these areas, we gave a boost (0.50 – 2 SD) to the landscape diversity score by proportionally recalling their original Z scores from 500-3500 to 500-2000 and adding them to the landform variety score 

Elevation Range Boost Area
We subtracted the landform variety Z score from the elevation range Z score such that a positive difference indicated the elevation range was greater than the landform variety relative to their respective means. We then identified areas where the elevation was both 1) above the mean ( >0.5 SD) and 2) the difference between the elevation and landform variety score was also above the mean (>0.5 SD). To these areas, we gave a slight boost (0.25 – 1 SD) to the landscape diversity score by proportionally recalling their original Z scores from 500-3500 to 250-1000 and adding them to the landform variety score 

Integrated Base Landscape Diversity Score
To create our base Landscape Diversity Score, the landform variety Z score was increased if cells were identified by any of the boosting criteria for elevation range or wetland density. The magnitude of the boost varied depending on the cell characteristics described above. In summary, the boosts varied between 1) Elevation Range boost: 0.25-1 SD and 2) Wetland Density boost: 0.5-2 SD.  The output base Landscape Diversity score was equal to landform variety score plus the sum of the boosts. This was then divided by the standard deviation of the analysis area to appropriately spread out the distribution and approximate standard normal units. 

Final Landscape Diversity Score with Setting Override
The base statewide Landscape Diversity map provided a measure for the entire study area, but this project also aimed to ensure we ultimately have a view of resilience that identify within each settings those areas that have “relatively more landscape diversity” compared to similar habitats within that stratification level. 

To ensure adequate stratification, we rescored the statewide landscape diversity map by “setting” to create a “Z” score within each setting. This helped us identify those areas within each setting that were relatively higher or lower scoring for landscape diversity. To our base statewide landscape diversity score, we then allowed an “override” to replace the statewide based score if the landscape diversity score was extremely high (>1SD above average) in the setting. By including these stratifications, we felt we were ensuring that our subsequent resilience products, which incorporate this landscape diversity score, are truly representing the areas of highest landscape diversity within each of the settings. Upon detailed study and review, our estimate of landscape diversity within the Pioneer Lava proved insufficient to capture the complexity and unique properties of species establishment and use of this habitat. The Pioneer Lava settings is shown as an overlay on final maps to show its distribution but further work would be necessary to represent landscape diversity and resilience in this unique setting.



Map Name: Layers

Legend

All Layers and Tables

Layers: Description:
Landscape Diversity Score
The landscape diversity score is a representation of the diversity of local microclimate options due to enduring topographic options (landforms, elevation range) and available enduring wetness (wetland areas). In the landscape diversity metric, we wanted to augment or increase the basic landform variety score if wetland density or elevation range were above average and significantly higher than the landform variety score.  To do this we created and integrated two additional indices: 

Wetland Density Boost Area
We subtracted the landform variety score from the wetland density score such that a positive difference indicated the wetland density was greater than the landform variety relative to their respective means. We then identified areas where wetland density was both 1) above the mean (>0.5 SD) and 2) the difference between wetland density and landform variety was also above the mean (>0.5 SD). To these areas, we gave a boost (0.50 – 2 SD) to the landscape diversity score by proportionally recalling their original Z scores from 500-3500 to 500-2000 and adding them to the landform variety score 

Elevation Range Boost Area
We subtracted the landform variety Z score from the elevation range Z score such that a positive difference indicated the elevation range was greater than the landform variety relative to their respective means. We then identified areas where the elevation was both 1) above the mean ( >0.5 SD) and 2) the difference between the elevation and landform variety score was also above the mean (>0.5 SD). To these areas, we gave a slight boost (0.25 – 1 SD) to the landscape diversity score by proportionally recalling their original Z scores from 500-3500 to 250-1000 and adding them to the landform variety score 

Integrated Base Landscape Diversity Score
To create our base Landscape Diversity Score, the landform variety Z score was increased if cells were identified by any of the boosting criteria for elevation range or wetland density. The magnitude of the boost varied depending on the cell characteristics described above. In summary, the boosts varied between 1) Elevation Range boost: 0.25-1 SD and 2) Wetland Density boost: 0.5-2 SD.  The output base Landscape Diversity score was equal to landform variety score plus the sum of the boosts. This was then divided by the standard deviation of the analysis area to appropriately spread out the distribution and approximate standard normal units. 

Final Landscape Diversity Score with Setting Override
The base statewide Landscape Diversity map provided a measure for the entire study area, but this project also aimed to ensure we ultimately have a view of resilience that identify within each settings those areas that have “relatively more landscape diversity” compared to similar habitats within that stratification level. 

To ensure adequate stratification, we rescored the statewide landscape diversity map by “setting” to create a “Z” score within each setting. This helped us identify those areas within each setting that were relatively higher or lower scoring for landscape diversity. To our base statewide landscape diversity score, we then allowed an “override” to replace the statewide based score if the landscape diversity score was extremely high (>1SD above average) in the setting. By including these stratifications, we felt we were ensuring that our subsequent resilience products, which incorporate this landscape diversity score, are truly representing the areas of highest landscape diversity within each of the settings. Upon detailed study and review, our estimate of landscape diversity within the Pioneer Lava proved insufficient to capture the complexity and unique properties of species establishment and use of this habitat. The Pioneer Lava settings is shown as an overlay on final maps to show its distribution but further work would be necessary to represent landscape diversity and resilience in this unique setting.



Copyright Text: Center for Resilient Conservation Science, The Nature Conservancy.

Spatial Reference:
102100

Single Fused Map Cache: true

Capabilities: Map,TilesOnly,Tilemap

Tile Info:
Initial Extent:
Full Extent:
Min Scale: 0.0
Max Scale: 0.0

Min LOD: 0
Max LOD: 13

Units: esriMeters

Supported Image Format Types: PNG

Export Tiles Allowed: false
Max Export Tiles Count: 100000

Resampling: true

Document Info: