cl_maintenanceAndUpdateFrequency

RI_543

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    Built-Up Areas are man-made land cover features, ranging from small hamlets at rural cross roads to large cities. This product requires the use of GIS software. *[GIS]: geographic information system

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    This layer contains point features that represent New Brunswick Geological Survey till sample locations where laboratory grain size analysis was completed. Grain size data are contained in the attribute data for each location. Grain size analysis is limited to the dry-sieved <2 mm fraction of collected till samples. This fraction of the till sediment is subjected to hydrometer grain size analysis to determine the percentages of sand, silt, and clay. The process is based on the hydrometer method of Bouyoucous 1962. Sand: 63 µm to 2 mm Silt: 2µm to 63 µm Clay: < 2 µm Bouyoucous, G.H. (1962) Hydrometer Method Improved for Making Particle Size Analysis of Soils. Agronomy Journal, 54, 464-465

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    Overview of the distribution of placer claims in Yukon. For display purposes only. 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

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    County boundaries for New Brunswick.

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    Non-Forest cover polygons interpreted from aerial imagery on a 10 year cycle for the province of New Brunswick. The attributes contain information that describes the non-forest characteristics for that polygon area including agriculture, settlement, utility corridors, etc.

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    Line information containing elevation isobars to aid in the depiction of changes in elevation at 1:1,000,000 scale. (eg. mountain peaks or depressions). Contour lines captured at 1:1,000,000 scale from Digital Chart of the World data for the Yukon and surrounding area. 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

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    Ecoregions of Yukon, 2014 is an update to the Yukon portion of the 1995 National Ecological Framework (NEF) described in Ecoregions of Yukon (Smith et al 2004). Because of people's familiarity with the 1995 NEF, and its use in management and planning, these ecoregion revisions attempted to retain the 1995 divisions unless there were compelling reasons to change them. In Yukon there were several compelling reasons to revise the 1995 NEF: 1) capitalize on availability of digital inventory and knowledge and improve or adjust the 1995 mapping as necessary, 2) harmonize stratification along jurisdictional borders, 3) incorporate line work updates to the Soil Landscape polygons by Agriculture and AgriFood Canada (AAFC) happening concurrently, and 4) include Yukon revisions in a national update of NEF ecozones across Canada - led by Environment Canada (CCEA 2017). Mapping the ecoregions of Yukon is largely a top-down process and the divisional hierarchy is nested. The lowest level of the hierarchy is the Soil Landscapes of Canada unit (Soil Landscape Component, or SLC). SLCs are organized according to a uniform set of national soil and landscape criteria that are based on permanent natural attributes. SLCs polygons are not published in this release. Ecozones, ecoregions and ecodistricts are subdivisions at the continental scale of climatic zones; attention to physiography increases as map scale increases. There are many reasonable ways to distinguish Yukon ecoregions. Ecoregions are delineated principally on abiotic features, such as bedrock geology, glacial history and physiography, and so are relatively stable (i.e. enduring) over time. While considering changes to the 1995 NEF, the project team continued to recognize major physiographic and climatic distinctions. At the ecozone level the team included a stronger regional climate element and related the ecozone level to the bioclimate framework. The Ecoregions of Yukon concept is used for broad scale management applications. Its structure helps define ecologically relevant management units at various scales. The Ecoregions of the Yukon Territory (Smith et al. 2004) describes Yukon's ecozones and ecoregions represented in the 1995 NEF (ESWG 1995). This reference continues to be a useful and relevant resource the Ecoregions of Yukon, 2014. For a fulsome treatment of the updates in the Ecoregions of Yukon, 2014 please refer to the report "Ecoregions of Yukon: Revisions to the Yukon portion of the National Ecological Framework." (McKenna, K, J. Meikle and N. Flynn 2014). 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

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    When the tenure data differs from the actual post locations on the ground, we use adjoining parcels to show that the area has no open ground. 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

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    Current weather induced overland flood alerts The Hydrologic Forecast Centre (HFC) issues several categories of flood alert throughout the year including riverine flooding due to snowmelt and rainfall, wind and wave induced shoreline flooding and ice pileup, and rainfall induced overland flooding. This layer demonstrates the location and/or extend of current alerts due to rainfall induced overland flooding. The types are defined below:Overland Flood Warning: A severe weather warning that is issued to alert the public that overland flooding is imminent or occurring in the warned area. Overland flooding is a quick onset of flood conditions, usually occurring after heavy rain that may not be linked to a specific waterway or lake. Rainfall intensity and duration, topography, soil conditions and ground cover are factors impacting overland flooding. Overland flooding can also occur because of a sudden release of water held by an ice jam.Overland Flood Watch: A severe weather watch that is issued when conditions are favourable for overland flooding. Normally issued when significant rainfall is expected in locations with saturated soil.

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    The Yukon is underlain by a great variety of rock types ranging in age from Early Proterozoic to Recent. The various rock types are characterized by different magnetic intensity and this map show those variations at the regional scale, with highly magnetic rocks represented by warm colours and non-magnetic rocks shown in cool colours. The First Vertical Derivative magnetic map highlights the magnetic intensity of near-surface features in the Earth's crust. This magnetic compilation was extracted from the compilation of Oneschuk et al. (2019). The data was gridded at 50 m. Magnetic data for Yukon can be obtained from: http://gdrdap.agg.nrcan.gc.ca/ 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