Wetland_Inv/LDI_2016 (MapServer)

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Service Description: This is the sixth edition of the landscape integrity/disturbance layer for the state of Colorado. This layer supersedes integ_2_2015 and previous versions. Note that this is not just an update, but a refinement of both data inputs and methods. As such it should NOT be directly compared with previous versions and under no circumstances should be treated as representing "change over time" with previous versions. Hence the change in title from "Landscape Integrity Layer" to "Landscape Disturbance Index" (LDI). This represents 8 individually modeled anthropogenic impacts that were then combined into a single layer. Impacts represented are: * Agriculture * Urban Development * Oil and Gas Development * Surface Mining * Roads * Utility lines (electrical transmission only) * Wind turbines * Solar installations Each individual layer has its own relevant weight and decay function type (see Supplemental Information). The individual impact layers are then additively combined to produce an overall disturbance layer. The weights are scaled to produce a final range where scores => 500 are High impact. Suggested classification of values: Value range Level of Impact ------------------------------------------ 0 None (or Minimal) > 0 - < 250 Low 250 - < 500 Moderate >= 500 High The model is based on distance decay functions for each input threat. The method of using distance decay is based on work by Tuffly and Comer (2005a and b), however the equations and parameters used are our own. We used modifications of an s-curve for the decay functions. By adjusting the shift and spread of the curve, it can be tailored to specific threats. The curve created is asymptotic at both ends, and so required post-function adjustments to make the area beyond the maximum distance = 0 and the area representing the physical footprint of the impact = the full weight. These layers are not mutually exclusive in the threats they represent, and are in fact chosen to compliment one another so as to make up for incomplete and inaccurate source data. Impact type weight distance decay function type source * Development - High/Medium 500 gradual LANDFIRE 1.3 & NLCD 2014 Development - Low 300 gradual LANDFIRE 1.3 & NLCD 2014 Agriculture - Tilled 300 moderate-abrupt Cropscape 2015 & SWReGAP 2004 Agriculture - Untilled 100 moderate-abrupt Cropscape 2015 & SWReGAP 2004 Roads - Primary/Secondary 500 moderate TIGER/Line 2015 Roads - Local/Primitive 300 abrupt TIGER/Line 2015 Oil & Gas Wells - Active 400 moderate COGCC 2016 Oil & Gas Wells - Inactive 200 moderate/abrupt COGCC 2016 Transmission lines 200 moderate/abrupt Sagemap 2004 Wind turbines 200 abrupt USGS 2015 Solar farms 200 abrupt USGS 2011 Surface Mines - Active 500 moderate CO-DRMS 2015 Surface Mines - Inactive 300 moderate CO-DRMS 2015 * Note that most sources were edited by CNHP to improve accuracy. Where: Decay Function | Cut off Distance | Equation Abrupt | 250 m | (1 / (1 + Exp(((Distance / 100) - 1) * 5))) * Weight Moderate-Abrupt | 600 m | (1 / (1 + Exp(((Distance / 100) - 2.5) * 2))) * Weight Moderate | 1250 m | (1 / (1 + Exp((Distance / 100) - 5))) * Weight Gradual | 2000 m | (1 / (1 + Exp(((Distance / 100) - 10) * 0.5))) * Weight Tuffly, M., and P. Comer. 2005a. Calculating Landscape Integrity: A Working Model. Draft of 4/19/2005. NatureServe, Boulder, CO. Available online at: http://conserveonline.org/workspaces/human.activity.index/li_data_4_19_2005.doc Tuffly, M., and P. Comer. 2005b. Example of landscape integrity from Puerto Rico. NatureServe, Boulder, CO. Available online at: http://conserveonline.org/workspaces/human.activity.index/PR%20example_Landscape%20Integrity.doc

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Landscape Disturbance Index 2016 (0)

Description:

Copyright Text: Colorado Natural Heritage Program

Spatial Reference: 102100 (3857)

Single Fused Map Cache: false

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Units: esriMeters

Supported Image Format Types: PNG32,PNG24,PNG,JPG,DIB,TIFF,EMF,PS,PDF,GIF,SVG,SVGZ,BMP

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Supports Dynamic Layers: false

MaxRecordCount: 1000

MaxImageHeight: 4096

MaxImageWidth: 4096

Supported Query Formats: JSON, AMF, geoJSON

Min Scale: 0

Max Scale: 0

Supports Datum Transformation: true

Child Resources: Info

Supported Operations: Export Map Identify QueryDomains Find Return Updates Generate KML