A limnimetric scale is a ruler, usually made of enamelled steel, that resists corrosion. They are generally attached by means of anchoring to existing infrastructures (bridge, quay, concrete wall) in order to ensure their durability. During periods of flooding, they allow municipalities to monitor and follow the rise in river levels. Purpose: Locate the speed scales that have been installed on waterways in the various administrative regions of Quebec as part of the vigilance project.**This third party metadata element was translated using an automated translation tool (Amazon Translate).**

Flood extent polygons for the past three months throughout Canada as monitored by Natural Resources Canada using satellite imagery for emergency response. In response to large flood events, Natural Resources Canada (NRCan), for the provision of emergency geomatics services, may be activated by Canada’s emergency management protocols. As new satellite imagery becomes available, NRCan will extract flood extent polygons and update the dataset in near real time (4 hours). This item contains the flood products generated in the past year. For any data relating to previous years, please refer to the [Floods in Canada – Archive]( https://open.canada.ca/data/en/dataset/74144824-206e-4cea-9fb9-72925a128189) entry. Please note that the web mapping service may not display data if flood polygons have not been published by the EGS for the current year. The flood products generated are validated on a best effort basis. Various factors may affect the quality of the flood polygons. These factors include, but are not limited to, sensor type, image resolution, cloud cover or limitations of the flood polygon extraction method. In this layer, where possible, a symbology is applied to the flood polygons based on the underlying land use classification, or is simply unclassified and shows the raw flood extent. When using Web mapping services, to display a specific product, filter by date (UTC Date) and area of interest (AOI). Also, a link to download each product is available in the Resources section. This prepackaged and compressed product contains a Shape file, a PDF file and a KMZ file. Disclaimer : Emergency response authorities are the primary users of these satellite-derived open water flood extent map products. These products are generated to provide analysis and emergency response situational awareness and to facilitate decision-making during major flood events. The open water flood extent products are generated rapidly and limited time is available for editing and validation. The flood products reflect the open water flood conditions at the date/time of acquisition. While efforts are made to produce high quality products, near-real time products may contain errors due to the limited time available for vector editing and validation. Please note that current algorithms do not map flooded areas under the forest canopy and are not optimized for urban flood mapping. Limitation of Liability : Accordingly, the information contained on this website is provided on an “as is” basis and Natural Resources Canada makes no representations or warranties respecting the information, either expressed or implied, arising by law or otherwise, including but not limited to, effectiveness, completeness, accuracy or fitness for a particular purpose. Natural Resources Canada does not assume any liability in respect of any damage or loss based on the use of this website. In no event shall Natural Resources Canada be liable in any way for any direct, indirect, special, incidental, consequential, or other damages based on any use of this website or any other website to which this site is linked, including, without limitation, any lost profits or revenue or business interruption. Parent Collection: - **[Floods in Canada - Cartographic Product Collection](https://open.canada.ca/data/en/dataset/08b810c2-7c81-40f1-adb1-c32c8a2c9f50)**

Lignes de courbes de niveau générés à partir des données LiDAR capturés par McElhanney Consulting Services Ltd (MCSL). Les courbes de niveau relient les points de même élévation pour le paysage visé par le projet. Pour plus d'information, consulter : http://ouvert.canada.ca/data/fr/dataset/9bdc1a9c-baf7-4eb0-a532-c1057b284b8f

Lignes de courbes de niveau générés à partir des données LiDAR capturés par McElhanney Consulting Services Ltd (MCSL). Les courbes de niveau relient les points de même élévation pour le paysage visé par le projet. Pour plus d'information, consulter : http://ouvert.canada.ca/data/fr/dataset/9bdc1a9c-baf7-4eb0-a532-c1057b284b8f

This layer presents the delimitation of the perimeter of the special intervention zone (ZIS) of the decree called “Declaration of a special intervention zone in order to promote better management of flood zones”. This zone was created using a variety of data sources presenting the 2017 and 2019 flooded areas. Since the adoption of Decree 817-2019, this dataset is no longer in force. For more information on the mapping of flood zones in Quebec, consult the Information available on the Ministry's website using the following link: http://www.cehq.gouv.qc.ca/zones-inond/zone-intervention-speciale.htm**This third party metadata element was translated using an automated translation tool (Amazon Translate).**

Geo-Flooding is an interactive map, accessible by mobile or computer, which allows you to consult the sectors for which information relating to flood zones is available. The information disseminated in this map 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)__ * __ [Special intervention zone of 2017-2019 (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://can01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.quebec.ca%2Fhabitation-territoire%2Famenagement-developpement-territoires%2Famenagement-territoire%2Fsysteme-information-gestion-amenagement-territoire%2Fterritoires%23c256667&data=05%7C02%7Crachel.asselin%40mrnf.gouv.qc.ca% 7c7fd9d90b03614c26746b08dcacd725d 4% 7c8705e97737814f4790e1c84c8b884da 1% 7C 0% 7C 0% 7C 0% 7C 0% 7C 7C 638546b08dcacd725d 4% 7c8705e937814f4790e1c84c8b884da 1% 7C 0% 7C 0% 7C 0% 7C 0% 7C 0% 7C 0% 7C 63857546b08dcacd725d 4% 7C8Fd9D9D90E1C84C8B884Da 1% 7C 0% 7C 0% 7C 0% 7C 0% 7C 0% 7C 0% 7C 63857546b08dcacd725d 4% qijoiv2lumZIILcjbtii6ik1hawwilcjxvci6mn 0% 3D%7C 0% 7C%7C%7C&sdata=tsgexwjv5p4mjvcdskitg22tgijra98zxkgjfrqafs 8% 3D&reserved=0) __ For information, the __ [Transitional Flood Area Management Regulation, of shores and coastline] (https://www.quebec.ca/gouvernement/politiques-orientations/plan-de-protection-du-territoire-face-aux-inondations/gestion-rives-littoral-zones-inondables/regime-transitoire)__ is in force since March 1, 2022. Under the __ [Transitional Regulation] (https://cdn-contenu.quebec.ca/cdn-contenu/adm/min/environnement/gestion-rives-littoral-zones-inondables/fiche-zones-inondables-visees.pdf)__), the flood zones in question are, with some exceptions, the boundaries established according to the most recent maps or flood ratings as of March 25, 2021, including territories flooded by spring floods in 2017 or 2019. The interactive map and the data are provided for information purposes only and have no legal value. It presents a standardized grid that identifies sectors for which information on flood zones is available (flood zone maps, flood ratings, etc.). __You must always check the information and regulations in force with the MRC or the municipality in question. __**This third party metadata element was translated using an automated translation tool (Amazon Translate).**

Ice maps produced for the prevention of flooding by ice jams and the monitoring of river ice during spring floods, winter temperatures or even during problems with ice jams. The maps are derived from radar satellite images, therefore available regardless of cloud cover, from several different sources, using algorithms to classify pixels into types of ice cover. Data is only processed and displayed on the main rivers at risk. The date the image was taken and the approximate region covered by the data is shown in the layer name. Data is added several times a week, but the frequency of revisits to each river can vary between 2 days and 2 weeks. __ | Name | Period | Satellite | Resolution | Algorithm | __ | R2 | 2018 - 2022 | Radarsat 2 | 7m | 7m | 7m | Icemap-r | | IceMap-r | | R | R | R | R | R | R | R | R | R | R | 2 times a week, 7 m | 7 m | IceMap-r | 7 m | | IceMap-r | 7 m | | IceMap-r | 7 m | | Icemap-r | | R | R | R | R | R | R | R | R | R | R | R | R | 2, 8, 7 m | | IceMap-r | 7 m | | IceMap-r 12.5m | owner DGI | The different classes in the legend make it possible to differentiate the following types of ice: * __Water (dark blue) __: open water * __Water/Smooth ice (blue) __: combination of water on ice, or spaced rafts of frasil * __Smooth ice (cyan) __: or black ice, the exact term for this type of ice is “columnar ice”, due to the vertical and elongated shape of the crystals that compose it. Black ice is generally transparent because it contains few or no air bubbles. It is formed by cooling, in fairly calm water, which is why it is sometimes called “thermal ice”. Its surface is very smooth. * __Consolidated ice (light pink) __: it includes Frasil ice or snow ice. Frasil ice forms in turbulent and very cold water. Composed of fine rounded crystals. These grains accumulate and rise to the surface to form moving ice rafts. These rafts end up close enough to freeze together (agglomerated ice). It contains a lot of air bubbles Its surface is slightly to moderately rough. * __Consolidated ice with accumulations (dark pink) __: ice cover formed by the stacking and freezing of various forms of moving ice. blocks that are superimposed or pieces of ice that are detached in one place and that are piled up in another. Moderately rough to very rough surface The images from Radarsat-2 and RCM are obtained through a partnership between Public Safety Canada and the MSP. The ICEMAP-R algorithm developed by INRS makes it possible to identify the type of ice according to the internal roughness of the ice (presence of air bubbles) and the roughness of the surface of the ice cover (presence of blocks and accumulations). The initial version was usable for Radarsat 2. The 2022 and 2023 RCM ice maps are given as an indication (new algorithm in process), only the 2024 data are processed with the Icemap-R algorithm adapted to RCM. Since 2018, the MSP has also used images from Sentinel-1, a radar satellite from the European Space Agency with a resolution of 10 m, resampled to 12.5m for ice maps. The images are then processed by the firm Arctus, which uses a proprietary algorithm. The output of the various algorithms has been reclassified to obtain a comparable legend. Historical data may have presented an alternative classification. Until 2022, the legend varied between winter and thaw. LIMITATIONS: the ice map is the result of an automated radar satellite image processing process. This process involves interpretation uncertainties that may be caused by the climatic conditions that prevailed when the image was acquired (melt, presence of water on the ice) or by physical characteristics of the watercourse (presence of shoals, islands or rapids). They also depend on the resolution of the initial images. Thus, although the ice map created is representative of reality, there may be some errors in identifying ice conditions at the local level. The use of the product is optimal when combined with field observations. The web service also contains visible satellite images from Landsat (L8, L9) or Sentinel 2 (S2); in this case colored compounds (false colors to benefit from the infrared bands in particular) are used to best visualize the presence of ice.**This third party metadata element was translated using an automated translation tool (Amazon Translate).**

Flood extent polygons representing active floods (last three days) throughout Canada as monitored by Natural Resources Canada using satellite imagery for emergency response. In response to large flood events, Natural Resources Canada (NRCan), for the provision of emergency geomatics services, may be activated by Canada’s emergency management protocols. As new satellite imagery becomes available, NRCan will extract flood extent polygons and update the dataset in near real time (4 hours). This item contains the latest flood products generated in the past three days. For any data older than 72 hours, please refer to the [Floods in Canada - Current Year](https://open.canada.ca/data/en/dataset/b1afd8d2-6e14-4ec4-9a09-652221a6cb71) entry. Note that the web mapping service may not display data if flood polygons have not been published by the EGS in the past three days. The flood products generated are validated on a best effort basis. Various factors may affect the quality of the flood polygons. These factors include, but are not limited to, sensor type, image resolution, cloud cover or limitations of the flood polygon extraction method. In this layer, where possible, a symbology is applied to the flood polygons based on the underlying land use classification, or is simply unclassified and shows the raw flood extent. When using Web mapping services, to display a specific product, filter by date (UTC Date) and area of interest (AOI). Also, a link to download each product directly is available in the Resources section. This prepackaged and compressed product contains a Shape file, a PDF file and a KMZ file. Disclaimer: Emergency response authorities are the primary users of these satellite-derived open water flood extent map products. These products are generated to provide analysis and emergency response situational awareness and to facilitate decision-making during major flood events. The open water flood extent products are generated rapidly and limited time is available for editing and validation. The flood products reflect the open water flood conditions at the date/time of acquisition. While efforts are made to produce high quality products, near-real time products may contain errors due to the limited time available for vector editing and validation. Please note that current algorithms do not map flooded areas under the forest canopy and are not optimized for urban flood mapping. Limitation of Liability: Accordingly, the information contained on this website is provided on an “as is” basis and Natural Resources Canada makes no representations or warranties respecting the information, either expressed or implied, arising by law or otherwise, including but not limited to, effectiveness, completeness, accuracy or fitness for a particular purpose. Natural Resources Canada does not assume any liability in respect of any damage or loss based on the use of this website. In no event shall Natural Resources Canada be liable in any way for any direct, indirect, special, incidental, consequential, or other damages based on any use of this website or any other website to which this site is linked, including, without limitation, any lost profits or revenue or business interruption. Parent Collection: - **[Floods in Canada - Cartographic Product Collection](https://open.canada.ca/data/en/dataset/08b810c2-7c81-40f1-adb1-c32c8a2c9f50)**

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) * 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).**

This layer shows the delimitation of the perimeter of the 2017-2019 flooded area found in Annex 2 of the decree called “Declaration of a special intervention zone in order to promote better management of flood zones”. This zone was created using a variety of data sources presenting the 2017 and 2019 flooded areas. For more information on the mapping of flood zones in Quebec, consult the Information available on the Ministry's website using the following link: http://www.cehq.gouv.qc.ca/zones-inond/zone-intervention-speciale.htm**This third party metadata element was translated using an automated translation tool (Amazon Translate).**