This map of the first vertical derivative of the magnetic field was derived from data acquired during an aeromagnetic survey carried out by Goldak Airborne Surveys during the period of May 16 to July 1, 2009. The data were recorded using a split-beam cesium vapour magnetometer mounted in the tail boom of a Piper Navajo aircraft. The nominal traverse and control line spacings were 400 m and 2400 m, respectively, and the aircraft flew at a nominal terrain clearance of 150 m.

The [Teslin flood hazard mapping study](https://flood-atlas.service.yukon.ca/pages/final-flood-maps) was completed between May 2023 and October 2024. Learn more by visiting the [Yukon Flood Atlas](https://flood-atlas.service.yukon.ca/pages/final-flood-maps). In the Resources section below, you can find the project summary, technical report, "What We Heard" report, GIS data files, and flood maps for specific areas. "AEP" in the flood map filenames below refers to "Annual Exceedance Probability", the annual likelihood of a flood occurring, expressed as a percentage. The flood scenarios used for mapping in the Yukon are the following: - 0.5% event (1-in-200 chance of occurring in any year), - 1% event (1-in-100 chance of occurring in any year), and - 5% event (1-in-20 chance of occurring in any year). For more information see [What is flood mapping?](https://flood-atlas.service.yukon.ca/pages/flood-mapping) or email [FloodMapping@yukon.ca](mailto:floodmapping@yukon.ca). ### See also - [Carmacks flood hazard maps](https://open.yukon.ca/data/datasets/carmacks-flood-hazard-maps) - [Southern Lakes flood hazard maps](https://open.yukon.ca/data/datasets/southern-lakes-flood-hazard-maps)

Aurora Geosciences Ltd was contracted to perform a review of publicly available digital magnetic geophysical data submitted with assessment reports to develop standardized products and compilations. Data submitted prior to March 2015 were considered. Individual assessment report data were levelled and integrated with 1:250 000 compilations. Four gridded PDFs have been produced (residual total magnetic field, reduced to pole, vertical derivative and tilt derivative). Original 250k geophysical data can be found in YGS Open File 2017-13.

Restricted map (managed forest code 33) used in the Forest Management in Canada, 2020 story map. Restricted map (managed forest code 33) with areas identified using provincial and territorial datasets. The Restricted map is used in the Story Map of Forest Management in Canada, 2020 (Aménagement des forêts au Canada, 2020) and includes the following tiled layer:Tile Layer of Restricted Managed Forest Code 33: 2020

Gross biological volume - total (GBVTOT) is an expression of in-the-tree stem total volume (m3) on a per-hectare basis. Calculated from the ground to the tip. Available here as a raster (GeoTIF) with a 20 m pixel resolution. Download: Here The Saskatchewan Ministry of Environment, Forest Service Branch, has developed a forest resource inventory (FRI) which meets a variety of strategic and operational planning information needs for the boreal plains. Such needs include information on the general land cover, terrain, and growing stock (height, diameter, basal area, timber volume and stem density) within the provincial forest and adjacent forest fringe. This inventory provides spatially explicit information as 10 m or 20 m raster grids and as vectors polygons for relatively homogeneous forest stands or naturally non-forested areas with a 0.5 ha minimum area and a 2.0 ha median area.  Gross biological volume per hectare - total (GBVTOT) is an expression of in-the-tree stem total volume (m3) on a per-hectare basis. Calculations are made from the ground to the tip. GBVTOT is available here as a color-mapped 16-bit unsigned integer raster grid in GeoTIFF format with a 20 m pixel resolution. An ArcGIS Pro layer file (*.lyrx) is supplied for viewing GBVTOT data in the following 50 m3/ha categories. Domain: [NULL, 0…1000]. RANGE LABEL RED GREEN BLUE 0 <= GBVTOT < 25 0 NA NA NA 25 <= GBVTOT < 75 50 63 81 181 75 <= GBVTOT < 125 100 66 101 160 125 <= GBVTOT < 175 150 68 121 138 175 <= GBVTOT < 225 200 71 140 117 225 <= GBVTOT < 275 250 74 160 96 275 <= GBVTOT < 325 300 85 178 79 325 <= GBVTOT < 375 350 123 191 74 375 <= GBVTOT < 425 400 161 203 70 425 <= GBVTOT < 475 450 198 216 66 475 <= GBVTOT < 525 500 236 229 61 525 <= GBVTOT < 575 550 255 226 53 575 <= GBVTOT < 625 600 255 209 40 625 <= GBVTOT < 675 650 255 191 28 675 <= GBVTOT < 725 700 255 174 16 725 <= GBVTOT < 775 750 255 156 3 775 <= GBVTOT < 825 800 253 139 9 825 <= GBVTOT < 875 850 251 121 20 875 <= GBVTOT < 925 900 249 103 31 925 <= GBVTOT < 975 950 246 85 43 975 <= GBVTOT <= 1000 1000 244 67 54 For more information, see the Forest Inventory Standard of the Saskatchewan Environmental Code, Forest Inventory Chapter.

Long-term tenure map (managed forest code 11) used in the Forest Management in Canada, 2020 story map. Long-term tenure map (managed forest code 11) with lands having more than five years volume- or area-based tenure or effectively having the equivalent, such as consistently recurrent commercial forest tenure with associated forest management activity. The Long-term tenure map is used in the Story Map of Forest Management in Canada, 2020 (Aménagement des forêts au Canada, 2020) and includes the following tiled layer:Tile Layer of Long-Term Tenure Managed Forest Code 11: 2020

Reprocessing of magnetic data for Yukon was performed between November 2016 and March 2017. Aeromagnetic data were compiled, data of different resolutions were merged, and a series of images individually levelled for each map sheet were produced. For each 250k-scale map, the following magnetic derivative maps were produced: 1. Residual Total Magnetic Field; 2. Reduced-to-Pole Magnetic Field (RTP); 3. First Vertical Derivative of the Reduced-to-Pole Magnetic Field (RTP_VD); and 4. Tilt Derivative of the Reduced-to-Pole Magnetic Field (RTP_TDR). These maps are provided as pdfs, geotiffs and Geosoft grid files. Colour ramps/legends are provided for each map.

These structure, isopach and zero edge files are part of a series of stratigraphic framework maps for the Saskatchewan Phanerozoic Fluids and Petroleum Systems (SPFPS) project. The series of stratigraphic framework maps for the Saskatchewan Phanerozoic Fluids and Petroleum Systems (SPFPS) project have been produced using 2 km equi-spaced modified grids generated from Golden Software’s Surfer 9 kriging algorithm. The dataset used to produce each of the maps in this series was created using data from several projects completed by the Ministry (Christopher, 2003; Saskatchewan Industry and Resources et al., 2004; Kreis et al., 2004; Marsh and Heinemann, 2006; Saskatchewan Ministry of Energy and Resources et al., 2007; Heinemann and Marsh, 2009); these data were validated and edited as required to facilitate correlations between the various regional projects. In addition, to minimize edge effects during contouring, the senior author also generated stratigraphic data from wells in adjacent jurisdictions.

These structure, isopach and zero edge files are part of a series of stratigraphic framework maps for the Saskatchewan Phanerozoic Fluids and Petroleum Systems (SPFPS) project. The series of stratigraphic framework maps for the Saskatchewan Phanerozoic Fluids and Petroleum Systems (SPFPS) project have been produced using 2 km equi-spaced modified grids generated from Golden Software’s Surfer 9 kriging algorithm. The dataset used to produce each of the maps in this series was created using data from several projects completed by the Ministry (Christopher, 2003; Saskatchewan Industry and Resources et al., 2004; Kreis et al., 2004; Marsh and Heinemann, 2006; Saskatchewan Ministry of Energy and Resources et al., 2007; Heinemann and Marsh, 2009); these data were validated and edited as required to facilitate correlations between the various regional projects. In addition, to minimize edge effects during contouring, the senior author also generated stratigraphic data from wells in adjacent jurisdictions.

This map of the first vertical derivative of the total magnetic field was derived from data acquired during a helicopter-borne aeromagnetic survey carried out by Fugro Airborne Surveys during the period between February 4 to March 15, 2010. The data were recorded using split-beam cesium vapour magnetometers (sensitivity = 0.005 nT) rigidly mounted on each of the two Astar 350B aircraft (C-FGSC and C-GAVO). The nominal traverse and control line spacings were, respectively, 400 m and 2 400 m, and the aircraft flew at a nominal terrain clearance of 100 m. Traverse lines were oriented N30°E with orthogonal control lines. The flight path was recovered following post-flight differential corrections to the raw Global Positioning System (GPS) data and inspection of ground images recorded by a vertically-mounted video camera. The survey was flown on a pre-determined flight surface to minimize differences in magnetic values at the intersections of control and traverse lines.