RESULTS Openings are administrative boundaries for areas harvested with silviculture obligations or natural disturbances with intended forest management activities on Crown Land. The RESULTS openings_svw is a spatial view made up of a number of tables containing information on disturbance dates, generalized bec, forest district, opening category, opening status, previous tree species, opening gross area, average slope, average elevation, aspect, along with maximum and minimum elevation values, and many more fields.

This layer contains attribute Opening information only and can be used in conjunction with other layers. RESULTS Openings is an administrative boundary that has been harvested with reforestation obligations or natural disturbance with intended forest management on Crown Land. This is a part of the Silviculture and Land Status dataset, which includes tracking achievmeent of silviculture obligations on Crown Land. Non-spatial attribute data delivered in CSV format

An opening's disturbance and silviculture activities reported into RESULTS. Most activities are within opening boundaries with the exception of broadcast treatments. An opening may have more than one activities associated with it. Activities may also overlap each other. Reporting of disturbance and silviculture attribute information is a mandatory requirement while the map is optional. This is part of the Silviculture and Land status Tracking dataset, which includes tracking harvesting and silviculture obligations on Crown Land

This layer is the current fire year burn severity classification for large fires (greater than 100 ha). Burn severity mapping is conducted using best available pre- and post-fire satellite multispectral imagery acquired by the MultiSpectral Instrument (MSI) aboard the Sentinel-2 satellite or the Operational Land Imager (OLI) sensor aboard the Landsat-8 and 9 satellites. Every attempt is made to use cloud, smoke, shadow and snow-free imagery that was acquired prior to September 30th. However, in late fire seasons imagery acquired after September 30th may be used. This layer is considered an interim product for the 1-year-later burn severity dataset (WHSE_FOREST_VEGETATION.VEG_BURN_SEVERITY_SP). Mapping conducted during the following growing season benefits from greater post-fire image availability and is expected to be more representative of tree mortality. #### Methodology: • Select suitable pre- and post-fire imagery or create a cloud/snow/smoke-free composite from multiple images scenes • Calculate normalized burn severity ratio (NBR) for pre- and post-fire images • Calculate difference NBR (dNBR) where dNBR = pre NBR – post NBR • Apply a scaling equation (dNBR_scaled = dNBR*1000 + 275)/5) • Apply BARC thresholds (76, 110, 187) to create a 4-class image (unburned, low severity, medium severity, and high severity) • Apply region-based filters to reduce noise • Confirm burn severity analysis results through visual quality control • Produce a vector dataset and apply Euclidian distance smoothing

This data shows the spatial extent of surface disturbance mapping projects completed by GIS contractors on behalf of Environment Yukon. Within these polygons, features were digitized using high resolution satellite imagery and orthophotos; outside these polygons, disturbance mapping is either incomplete or non-existent. Distributed from GeoYukon by the Government of Yukon . Discover more digital map data and interactive maps from Yukon's digital map data collection. For more information: geomatics.help@yukon.ca

This data shows anthropogenic polyline disturbance features. Features were digitized using high resolution satellite imagery and orthophotos. Features from the National Road Network (NRN) and the National Railway Network (NRWN) were adapted and included. The following data was not included in the dataset: proposed features. Table 1. A list of attributes, associated domains, and descriptions. Attribute Data Type Domains Description REF_ID Text (20) Unique feature reference ID DATABASE Text (20) Historic, Most Recent, Retired Sub-database to which the feature belongs TYPE_INDUSTRY Text (50) Table 2.3.2 Major classification of disturbance feature by industry TYPE_DISTURBANCE Text (50) Table 2.3.2 Sub classification of disturbance feature WIDTH_M* Double Width of feature in meters WIDTH_CLASS** Text (5) HIGH, MED, LOW Width of feature by classification SCALE_CAPTURED Long Scale at which the feature was digitized DATA_SOURCE Text (10) Imagery, GPS, Other Data source: digitized from imagery, captured by GPS, or obtained by other means IMAGE_NAME Text (100) Filename of source imagery IMAGE_DATE Date Date that imagery was captured (YYYYMMDD) IMAGE_RESOLUTION Double Resolution of source imagery in meters IMAGE_SENSOR Text (35) Name of sensor that captured source imagery *WIDTH_M: Linear features must be attributed with a width measurement. The width of the feature can be estimated in meters, rounded to the nearest whole number. **WIDTH_CLASS: This field employs a classification scheme used by previous contractors. This classification scheme was discussed and agreed upon by Mammoth Mapping and the Project Manager in 2011-2013. The width values are the following. Table 2. Width classification breakdown. WIDTH_CLASS Anticipated Value Range (meters) LOW <4 MED 4-8 HIGH >8 Table 3. A list of disturbance feature types and their descriptions. TYPE_INDUSTRY TYPE_DISTURBANCE DESCRIPTION Mining Survey / Cutline A linear cleared area through undeveloped land, used for line-of-sight surveying; impossible to distinguish whether associated with quartz or placer mining (overlapping or unclear claims information) Survey / Cutline - Placer A linear cleared area through undeveloped land, used for line-of-sight surveying; associated with placer mining (identified using claims information and/or other indicators) Survey / Cutline - Quartz A linear cleared area through undeveloped land, used for line-of-sight surveying; associated with quartz mining (identified using claims information and/or other indicators) Trench A long, narrow excavation dug to expose vein or ore structure Unknown Unknown linear mining disturbance Oil and Gas Pipeline Visible pipeline or pipeline Right-of-Way (above- or below-ground) Seismic Line Seismic lines Rural Driveway A driveway in a rural area Fence A fence in a rural area Transportation Access Assumed A linear feature that is assumed to be an access road, but could also be a trail Access Road A road or narrow passage whose primary function is to provide access for resource extraction (i.e. mining, forestry) and may also have served in providing public access to the backcountry. Arterial Road A major thoroughfare with medium to large traffic capacity Local Road A low-speed thoroughfare, provides access to front of properties, including those with potential public restrictions such as trailer parks, First Nations land, private estate, seasonal residences, gravel pits (NRN definition for Local Street/Local Strata/Local Unknown). Shows signs of regular use. Right of Way For Road Rights as attributed in the land parcels ancillary data Trail Path or track (typically <1.5 m wide) used for walking, cycling, ORV, or other backcountry activities. (Note: trails used for mining activities are Access Roads.) Unpaved Road Dirt or gravel road (typically >1.5 m wide) that does not necessarily access remote resources Unknown Right of Way A right of way with unknown industry type Survey / Cutline A linear cleared area through undeveloped land, used for line-of-sight surveying. A cutline may not always be associated with mineral exploration, therefore, Type: Unknown was used to differentiate all cutlines that were outside of mineral exploration. Unknown Unclassified, or unable to identify type based on imagery, but suspected to be anthropogenic Utility Electric Utility Corridor Corridor usually running parallel to highway, where transmission lines or other utilities are visible Unknown Unknown linear feature assumed to be a utility corridor; ancillary data is unclear. Distributed from GeoYukon by the Government of Yukon . Discover more digital map data and interactive maps from Yukon's digital map data collection. For more information: geomatics.help@yukon.ca