This map illustrates the terrestrial and marine reliefs of Quebec and surrounding territories, at a scale of 1/2,000,000. Color ranges representing altitude classes and blending offer a summary of the relief and the major physiographic groups of Quebec. This map of the relief of Quebec is available in two versions: * The general map, which illustrates the relief and the borders (GeoTIFF version only); * The toponymic map, which illustrates the relief, some toponyms and borders (GeoTIFF and PDF versions). **This third party metadata element was translated using an automated translation tool (Amazon Translate).**

This hypsometric layer represents the relief of Quebec territory at a scale of 1/20,000. Level curves are taken from ** [topographic maps on a scale of 1/20,000] (https://www.donneesquebec.ca/recherche/fr/dataset/cartes-topographiques-a-l-echelle-de-1-20-000) **. They are generally at an equidistance of ten meters and, in some cases, they can vary between eight and twenty meters. This data layer includes contour lines and dimensional points as points and text. Each file covers an area of approximately 250 km2. The web service is produced using topographic data at a scale of 1/20,000 in the south and map data from Natural Resources Canada (CanVec product) at a scale of 1/50,000 in the north.**This third party metadata element was translated using an automated translation tool (Amazon Translate).**

The Quebec building reference system consists of a continuous layer, created from a bird's eye view and presented in the form of vector polygons. This work is part of the effort to provide Quebec with a rich and comprehensive database that brings together information related to the built environment. It is the result of collaborative work between the Center for Research in Geospatial Data and Intelligence at Laval University, the municipal sector, Natural Resources Canada and Quebec ministries and agencies. This data set integrates geometries from various partnerships and produced using artificial intelligence and automated extraction algorithms. The geographic coverage corresponds to the information available when it was published and will be extended according to the availability of new data. For changes since the previous release or for more details on the production techniques and source data used, consult the ** [attribute list] (https://diffusion.mern.gouv.qc.ca/diffusion/RGQ/Vectoriel/Theme/Local/ReferentielBati/Document/ListeAttributs_RefBati.pdf) **. ## #Caractéristiques levels of completeness The quality of the geometric data may vary depending on the level of completeness (NC)\ * reached and could differ from the reality on the ground, both in terms of representation and in terms of authenticity. This release incorporates NC-0 and NC-1 data corresponding to the following descriptions: * NC-0: Raw vector geometries, from various sources, without quality control performed; * NC-1: Geometries validated manually (adjustments, additions, deletions). \ * _Each level of completeness (NC) characterizes the level of editing work, validation, and descriptive content of the dataset. Thematic information will be added to the data set_. **This third party metadata element was translated using an automated translation tool (Amazon Translate).**

The GNSS (Global Navigation Satellite System), or satellite positioning system, includes all satellite navigation systems. It allows you to know your location, anywhere in the country. Theoretical GNSS specifications estimate the accuracy of the position obtained from a receiver to be approximately 15 meters in planimetry and 25 meters in altimetry. By combining the data with that of another receiver placed on a known geodesic point, the accuracy of the obtained position can vary from a few centimeters to a few meters, depending on the type of receiver used. In order to increase accuracy, the Government of Quebec records data continuously through a network of 18 GNSS stations. These stations are located on geodetic points that are free of any obstacles and capture data from the GPS and GLONASS constellations. Some of these stations receive signals from the Galileo constellation. This data is available in the standard exchange format*Receiver Independent Exchange Format* (RINEX), version 2.11. This format is recognized by the majority of GNSS data processing software. The data is accessible on the __ [ftp server] (ftp://ftp.mrn.gouv.qc.ca/Public/GPS)__) of the MRNF or using the __ [Interactive Map] (https://geodesie.portailcartographique.gouv.qc.ca/)__) of the geodetic network. It should be noted that only data from the last 366 days is kept. The structure of the directories and files on the __ [ftp server] (ftp://ftp.mrn.gouv.qc.ca/Public/GPS)__) as well as the coordinates of the stations are presented in the document __ [GNSS sensor stations] (https://diffusion.mern.gouv.qc.ca/diffusion/RGQ/Documentation/Geodesie/Stations_GNSS.pdf)__. # #État GNSS stations## You can consult the status of the stations in the document __ [Status of GNSS stations] (https://diffusion.mern.gouv.qc.ca/diffusion/RGQ/Documentation/Geodesie/État_Stations_GNSS.pdf)__. You will be notified if a station is in service, out of service, or if equipment maintenance is planned. # #GNSS in real time by cell phone The government also offers GNSS data by cellular telephone, which allows centimetric positioning work to be carried out in real time. Users of georeferenced data can thus, with a single multi-frequency GNSS receiver equipped with a modem by cellular telephone, identify or implement any physical detail with an accuracy of a few centimeters in the NAD 83 reference system (SCRS) (period 1997.0). The signal that contains this data is available to everyone. The range depends on telephone coverage, ionospheric conditions and especially on the instruments used. For more information on using GNSS in real time, see document __ [Guidelines for GNSS RTK/RTN Surveys in Canada] (http://publications.gc.ca/site/fra/9.822883/publication.html)__. # #Détails techniques The transmission of GNSS data as well as the station's NAD 83 (SCRS) coordinates (period 1997.0) is transmitted by cellular telephony from an IP address on the Internet. Each station transmits its data in one of the following two formats: CMR+ or RTCM V3.2. The document __ [GNSS capture stations] (https://diffusion.mern.gouv.qc.ca/diffusion/RGQ/Documentation/Geodesie/Stations_GNSS.pdf)__) gives for each city the IP address of the CMR+ or RTCM V3.2 formats as well as the antenna model. It should be noted that the data is not broadcast according to the*Networked Transport of RTCM protocol via Internet Protocol* (NTRIP). **This third party metadata element was translated using an automated translation tool (Amazon Translate).**

During flooding episodes, areas may be flooded even though the cartography established does not indicate that they are located in flood zones. This situation can occur when the water levels reached exceed those represented on the map or when floods affect areas that have not yet been studied. These cartographic data correspond to the delimitation of these territories and are used to produce event maps of these floods. __To date, the following sectors have been maped:__ * Lac-Saint-Jean (2022) * Saint-Maurice River (2022) Photogrammetric capture, allowing the delimitation of these territories, was carried out following the farthest limit reached by the waters from aerial photographs taken during the floods. It should be noted that this work is part of measure 4 of __ [Plan for the protection of the territory against floods (PPTFI)] (https://www.quebec.ca/gouvernement/politiques-orientations/plan-de-protection-du-territoire-face-aux-inondations)__. **This third party metadata element was translated using an automated translation tool (Amazon Translate).**

The standardized grid identifies sectors for which information on flood zones is available (old-generation maps, flood ratings, etc.). **Contact [the municipality or the MRC] (https://www.quebec.ca/gouvernement/portrait-quebec/repertoire-municipalites) () to check if flood zone boundaries have been established on old-generation maps for a property **. The information disseminated in this grid comes from the following three sources of information (work has been done on the data to standardize everything): * __ [Territory flooded in 2017 and 2019] (https://www.donneesquebec.ca/recherche/dataset/territoire-inonde-en-2017-et-2019)__ * __ [2017-2019 Special Intervention Zone (from which territories covered by a ministerial decree are excluded)] (https://www.donneesquebec.ca/recherche/dataset/delimitation-du-perimetre-de-la-zone-d-intervention-speciale-zis-annexe2-modifie)__ * __Mapping of flood zones identified by the MRCs and represented in the Provincial Land Use Portrait (PPAT) . __ For more details about the PPAT, consult the following page: __ [Application Territories - Provincial Land Use Portrait (PPAT)] (https://www.quebec.ca/habitation-territoire/amenagement-developpement-territoires/amenagement-territoire/systeme-information-gestion-amenagement-territoire/territoires#c256667)__ **The standardized grid is provided for information purposes only and has no legal value. ****This third party metadata element was translated using an automated translation tool (Amazon Translate).**

The Geobase of the Quebec Hydrographic Network (GRHQ) is the common frame of reference for hydrography in Quebec. It is a detailed hydrographic network that can support numerous applications in land use planning, the environment and civil security. The GRHQ is produced in partnership with the Ministry of the Environment, the Fight against Climate Change, Wildlife and Parks (MELCCFP) and the Ministry of Natural Resources and Forests (MRNF) using the following data: * The hydrographic classes from the Quebec Topographic Database (BDTQ) at the scale of 1/20,000 of the MERN for the south of the province; * CanVec's hydrographic classes at the scale of 1/50,000 from Natural Resources Canada for the north; * The continuity segments of the MELCCFP network; * The hydrographic division units of the MELCCFP; * The official toponyms from the TOPOS database of the Toponymy Commission. The main components are: _Geometric network_ * Points * Point components of the geometric network (hydrographic junctions). * Lines * Linear geometric network representing the continuity of flow across all types of hydrographic entities (linear and surface). _Thematic Information_ * Points * Class of context entities represented in point form that enrich the thematic content of the various hydrographic components. * Lines * Class of context entities represented in linear form that enrich the thematic content of the various hydrographic components. * Class of linear entities representing the shores of hydrographic surfaces. * Surfaces * Class of context entities represented in surface form that enrich the thematic content of the various hydrographic components. * Class of surface entities representing hydrographic surfaces. _Management Units_ * Surfaces * Class of surface entities representing hydrographic division units (UDHs). **This third party metadata element was translated using an automated translation tool (Amazon Translate).**

The allocation of public land consists in defining the government's guidelines for the use and protection of public territory. PATPs make it possible to guide the interventions of the various actors in the field by providing them with the necessary bases for integrated management of land and resources in the State domain. This strategic approach thus contributes to the harmonious and sustainable development of public land, while reducing conflicts of use. **This third party metadata element was translated using an automated translation tool (Amazon Translate).**

Map indexes are grids that divide the territory into several sheets for the whole of Quebec. The use of these indexes allows the identification of a map sheet number for a specific territory at the scale of 1/2,000, 1/20,000 and 1/100,000. The cartographic indexes come from the Quebec cartographic reference system (S.Q.R.C), which divides the territory into hierarchical units and at different scales (1/100,000, 1/20,000, 1/10,000, 1/10,000, 1/10,000, 1/10,000, 1/10,000, 1/5,000, 1/5,000, 1/5,000, 1/1,000). This system is compatible with the [**National Cartographic Reference System (S.N.R.C) **] (https://ressources-naturelles.canada.ca/sciences-terre/geographie/information-topographique/cartes/9766).**This third party metadata element was translated using an automated translation tool (Amazon Translate).**

**Note that topographic maps at a scale of 1/100,000 are no longer updated. For the latest update date, see the [metadata] (ftp://transfert.mern.gouv.qc.ca/public/diffusion/RGQ/Documentation/BDAT/Metadonnees_BDAT100k_NordSud.xls). The reference cartographic data is now constituted according to a continuous information layer approach: ** * [AQNetwork+] (https://www.donneesquebec.ca/recherche/fr/dataset/adresses-quebec) * [Quebec Hydrographic Network Geobase (GRHQ)] (https://www.donneesquebec.ca/recherche/dataset/grhq) * [Administrative divisions on a scale of 1/20,000 (SDA)] (https://www.donneesquebec.ca/recherche/fr/dataset/decoupages-administratifs) * [Regional Coherent Hydro Digital Terrain Models (RTM)] (https://www.donneesquebec.ca/recherche/fr/dataset/modeles-numerique-de-terrain-hydro-coherents-a-l-echelle-regionale) ___ Topographic maps at a scale of 1/100,000 offer an overview of the occupation of Quebec territory at a scale of 1/100,000. A series in the south (266 sheets) and a series in the north (151 sheets) of the 53rd parallel cover the majority of Quebec. The data is less than 10 meters accurate and each file covers an area of approximately 4,000 km2, equivalent to 16 sheets at [a scale of 1/20,000] (https://www.donneesquebec.ca/recherche/fr/dataset/cartes-topographiques-a-l-echelle-de-1-20-000 “Topographic maps at a scale of 1/20,000”). Main components: * Hydrography (lakes of more than three hectares, permanent watercourses, swamps, etc.). * Vegetation (wooded areas and peatlands of more than 13 hectares). * The constructions of man: * transport infrastructures (passable roads, bridges, airports, etc.); * buildings larger than 12,500 m2; * equipment and designated areas. * The relief (level curves at an equidistance of 20 meters and elevation points). ##### Special features of the series south of the 53rd parallel * The data is obtained by generalizing cartographic data at a scale of 1/20,000. Between the 51st and 53rd parallel, they are extracted from SPOT satellite imagery at 10 meters of resolution. * The data formats available for this series are: * ArcInfo cover (vector); * GeoTIFF, CCL projection (matrix); * GeoTIFF, MTM projection (matrix); * PDF (matrix). ##### Special features of the series north of the 53rd parallel * The data is obtained by generalizing cartographic data from Natural Resources Canada (CanVec product) at a scale of 1:50,000. Multi-source data, namely data from Adresses Québec, data on airports and hydrobases from the Ministère des Transports du Québec, and data on reservoirs from Hydro-Québec, increase the quality of this cartographic product on a scale of 1/100,000. * The data format available for this series is: * FGDB (vector).**This third party metadata element was translated using an automated translation tool (Amazon Translate).**