This repository presents an analysis that generates 2 raster layers: 1) a human footprint/human disturbance layer; and 2) a ‘source’ layer that weights land/water cover according to how likely they will provide habitat. The layers are assigned resistance and source weights following McRae et al 2016 https://www.conservationgateway.org/ConservationByGeography/NorthAmerica/UnitedStates/oregon/science/Documents/McRae_et_al_2016_PNW_CNS_Connectivity.pdf.
This analysis uses the Province’s Cumulative Effects consolidated roads and disturbance layers.
The consolidated roads are available from the B.C. Data Catalogue (https://catalogue.data.gov.bc.ca/dataset/ce-roads-2021). They are based on the British Columbia Digital Road Atlas available from the B.C. Data Catalogue and distributed under the Access Only - B.C. Crown Copyright licence.
The consolidated disturbance is available from the B.C. Data Catalogue (https://catalogue.data.gov.bc.ca/dataset/ce-disturbance-2021).
There are a set of core scripts that are required for the analysis, a run_all.R script is used to control their execution:
The repo will download the CE disturbance and road layers from the BC Data Catalogue. An excel spreadsheet of disturbance and source weights should be in the data directory. An area of interest (AOI) can be used to clip data for testing - links to EcoSection, EcoRegion and watersheds are provided. Warning Provincial scale analysis is computationally intensive.
This project is part of a Provincial conservation assessment being led by the Ministry of Environment and Climate Change Strategy. The analysis is exploratory.
Updates to the disturbance layer is required, including: seperating urban into 1) high, 2) low density, and 3) rural; Modifying cut blocks by age to have recent and historic; Modifying range to differentiate front and back country range.
Roads are rasterized at 100m and assumes that the ‘footprint’ of a road extends 50m on either side of the mid line. Potential modifications include generating a distance to road surface with an assigned a decay value based on road type.
Other modifications include buffering water and ocean and applying varying weights based on distance from shore.
To report bugs/issues/feature requests, please file an issue.
If you would like to contribute, please see our CONTRIBUTING guidelines.
Please note that this project is released with a Contributor Code of Conduct. By participating in this project you agree to abide by its terms.
Copyright 2021 Province of British Columbia
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and limitations under the License.This project was created using the bcgovr package.
This repository is maintained by ENVEcosystems.