__The link: *Access the data directory* is available in the section*Dataset Description Sheets; Additional Information*__. The original ecoforest map of the third inventory is made from aerial photographs as well as several other products to inform the photointerpreter (forest interventions, information concerning natural disturbances, data from previous inventories, etc.). This map shows the various forest and ecological characteristics of the forest territory and corresponds to the forest profile up to the year in which the aerial photograph was taken. To learn more about ecoforest stratification parameters, simply consult Chapter 3 of the document [*Ecoforest Mapping Standards — Third Ecoforest Inventory (MRNF, 2009) *] (https://mrnf.gouv.qc.ca/documents/forets/inventaire/norme-cartographie-ecoforestiere.pdf). __Note that__ the original ecoforest map of the third inventory has been complete since 2003 and that no new cartographic information has been added since then. Note, however, that improvements were made to the dataset format in 2025.**This third party metadata element was translated using an automated translation tool (Amazon Translate).**

__The link: *Access the data directory* is available in the section*Dataset Description Sheets; Additional Information*__. **Surface deposit** is the layer of loose material that covers rock. The deposit may have been established during the retreat of the glacier at the end of the last glaciation or by other processes associated with erosion and sedimentation. The nature of the loose deposit is evaluated based on the shape of the land, its position on the slope, the texture of the soil, or other indicators. Surface deposit maps make it possible to distinguish the main categories of surface deposits and to know their nature, thickness and distribution on Quebec territory. Based on the interpretation of aerial photographs at a scale of 1/40,000 and control points in the field as part of the ecoforest inventory of southern Quebec, this mapping contributes in particular to the development of ecological forest products. __ ⚠️ Notes: __ + This mapping covers almost the entire territory of Quebec south of the 52nd parallel. It is distributed by **map sheet at a scale of 1/50,000.** Surface deposits have a minimum area of 4 ha.**This third party metadata element was translated using an automated translation tool (Amazon Translate).**

__The link: *Access the data directory* is available in the section*Dataset Description Sheets; Additional Information*__. The Directorate of Forest Inventories (DIF) carries out assessments of tree biomass and their carbon content at the scale of ecoforest stands to deepen knowledge on the contribution of forests in the global carbon cycle. This information can be useful in the context of climate change to document the mitigating role played by forests. The resulting product, a database containing a single table entitled “BIOMASSE_CARBONE_PEE_ORI_PROV”, shows the biomass and carbon values of living trees above ground for all productive ecoforest stands 7 m or more in height. The exploitation of the database requires the data from [the original ecoforest map] (https://www.donneesquebec.ca/recherche/dataset/resultats-d-inventaire-et-carte-ecoforestiere) and the establishment of a connection with the information of the polygonal entity class of settlements. The database includes biomass variables converted to carbon stocks, detailing the biomass of wood, bark, branches, and foliage. For a thorough understanding, you can consult the Read Me associated with this product and the publication [“Biomass and carbon forests in southern Quebec - Method and use”] (https://mrnf.gouv.qc.ca/nos-publications/biomasse-carbone-forestiers-quebec-meridional/) (MRNF, 2023) which offers additional methodological information.**This third party metadata element was translated using an automated translation tool (Amazon Translate).**

__The link: *Access the data directory* is available in the section*Dataset Description Sheets; Additional Information*__. Two products are available to know the gross commercial volume of a tree according to its diameter at chest height (DHP) and its height. Their contents and the way of using them are different, but they both make it possible to obtain gross commercial volume values per tree. The first product is the **LIN3 cubing rate**. It is presented in the form of a table where the values of the gross market volume can be extracted directly. These are local rates, i.e. the height used in the general rate equation (volume prediction models) is predicted by height-DHP relationships developed per survey unit. The second product offers increased precision. It is presented in the form of several tables where the values of the gross commercial volume do not appear directly. Rather, the content of these tables is used to apply **models for predicting the height and gross commercial volume** of a tree. Height prediction models are also developed locally at the scale of survey units. The use of the product requires consultation of the document [“Models for predicting the height and the gross commercial volume of trees - Method and use”] (https://mrnf.gouv.qc.ca/nos-publications/modele-prediction-hauteur-volume/). __ 📣 Recommendation of the Forest Inventory Directorate: __ it is preferable to use the models for predicting the height and the gross market volume in the territories where they are available. In the absence of these models, it is still possible to use the LIN3 cubing rate.**This third party metadata element was translated using an automated translation tool (Amazon Translate).**

__The link: *Access the data directory* is available in the section*Dataset Description Sheets; Additional Information*__. The **Harvest and other silvicultural interventions** mapping is produced as part of the ecoforestry inventory of southern Quebec in order to maintain an up-to-date portrait of the forest. Several stakeholders related to forest operations participate in maintaining this forest portrait, including the Regional Operations Sector of the Ministry of Natural Resources and Forests (MRNF), private forest development agencies and major landowners. This map contains information on forest interventions carried out on the territory (e.g. harvesting, thinning, reforestation) as well as the year of the work. The period of work begins at the beginning of the 20th century (when information is available) to the present day. The associated information is presented as a series of overlays of interventions. This map covers the commercial territory of public forests and private forests in Quebec. **The minimum mapping area is 0.1 ha.** __ ⚠️ Note that__ when there is more than one intervention on the same territory during the same year, priority is given to the one that changes the forest cover in a sustainable way (e.g. planting). To have access to all the interventions for the same year (in public forests only), please consult the technical and financial activity reports (RATF) distributed by the Ministry's Regional Operations Sector on the government website of Data Québec.**This third party metadata element was translated using an automated translation tool (Amazon Translate).**

__The link: * Access the data directory* is available in the section*Dataset description sheets; Additional information*__. Ecoforest maps in PDF format are available at a scale of 1/20,000 and cover Quebec territory approximately up to the 52nd parallel. Each map covers an average area of approximately 250 km2 and presents forest information for the territory concerned. Its accuracy is approximately 10 meters. These maps are an image of the current ecoforest map for the corresponding year. __Maps 2021, 2022, 2023 and 2024__ The maps 2021, 2022, 2023, as well as those of 2024 are produced from the up-to-date ecoforest map of the corresponding year. It represents the result of the photo-interpretation of aerial photographs taken during the 4th and 5th ecoforestry inventories of southern Quebec to which were added natural disturbances (fires, epidemics, windfalls, etc.) and forest interventions (harvesting and reforestation) carried out in the public forest following the year in which the picture was taken. According to the maps, data using the forest stand inventory approach (AIPF) is included when available for a complete sheet. Main components: type of vegetation (forest species group, density class, class of density, class of height, age class, etc.) or type of AIPF vegetation (detailed forest species, density (%), height (m), age class, etc.); slope class; class of slope; nature of the terrain (peatlands, height class, age class, etc.); topography (level curves); fragmentation. __2019 and 2020 maps__ The 2019 maps, as well as those of 2020, are produced from up-to-date ecoforest maps of the corresponding year. They represent the result of the photo-interpretation of aerial photographs taken during the 4th and 5th ecoforestry inventories of southern Quebec to which were added natural disturbances (fires, epidemics, windfalls, etc.) and forest interventions (harvesting and reforestation) carried out in the public forest following the year in which the photo-interpretation of aerial photographs from the 4th and 5th ecoforestry inventories of southern Quebec were taken. An update is then carried out taking into account natural disturbances (fires, epidemics, windfalls, etc.) and forest interventions (harvesting and reforestation) carried out in public forests. The information presented corresponds to the current ecoforest map of 2019 or 2020 as the case may be. On each of the maps, the name of the stands is expressed by the group of species. Main components: type of vegetation (forest species, density, height, height, age class, etc.); slope class; nature of the terrain (peatlands, gravel, etc.); hydrography (lakes, rivers, streams, streams, swamps, etc.); transport network and swamps, etc.); transport network and bridges; topography (level curves); fragmentation. __Maps 2015__ The 2015 maps are produced from the photo-interpretation of aerial photographs from the 3rd and 4th ecoforest inventories of southern Quebec. An update is then carried out taking into account natural disturbances (fires, epidemics, windfalls, etc.) and forest interventions (cutting and planting) carried out in public forests. The information presented corresponds to the 2015 updated ecoforest map. MAP FOR PRINTING (GEOREFERENCED)**This third party metadata element was translated using an automated translation tool (Amazon Translate).**

__The link: *Access the data directory* is available in the section*Dataset Description Sheets; Additional Information*__. The **Station Quality Index (PQS) plot ** is the sampling unit that made it possible to characterize the productivity of stations in the Quebec forest ecological classification system. These are circular plots where the physical and vegetation characteristics of the station have been recorded. Thus, the stems were counted, and the ecological type of the station was determined. In each plot, about ten study trees were selected, felled and cut at several heights along the trunk. A total of **1,644** plots were installed, and **12,215** plots were analyzed. The location of the plots was recorded using a GPS. This dataset covers most of the public forest in the territory of the ecoforest inventory of southern Quebec. __ ⚠️ Note that__ the sampling was carried out between 1999 and 2009, and the dataset will not be updated.**This third party metadata element was translated using an automated translation tool (Amazon Translate).**

__The link: *Access the data directory* is available in the section*Dataset Description Sheets; Additional Information*__. The ecoforest inventory north of the northern limit of attributable forests is an extensive inventory that was carried out for specific knowledge acquisition needs. It was carried out between 2005 and 2009 as part of the work of the scientific committee responsible for examining the northern limit of attributable forests (Nordic Ecoforest Inventory Program [PIEN]). The data in this inventory comes from a cartography that is based both on the use of archival aerial photographs interpreted in three dimensions on the screen and on the analysis of satellite images. This dataset covers the territory between the 50th and 53rd parallel and covers an area of 242,000 km2. It includes forest and ecological mapping data (vegetation, surface deposits and drainage) as well as ecodendrometric sample plot data. This data is distributed by map sheet at a scale of 1/250,000. The minimum mapping area is 8 ha for stands and 4 ha for surface deposits.**This third party metadata element was translated using an automated translation tool (Amazon Translate).**

__The link: *Access the data directory* is available in the section*Dataset Description Sheets; Additional Information*__. The forest fire map shows forest fires that occurred mainly in the territory of southern Quebec, i.e. the area located south of the territorial limit of attributable forests. This map data makes it possible to improve knowledge about fire regimes and to meet the specific needs of special management plans following forest fires. They can also be used to meet a variety of study and research needs, such as analyzing the impact of climate change, modeling post-fire regeneration, and studying ecosystem dynamics. This information is obtained from and produced from a variety of sources, including satellite images, aerial photographs, field or aerial surveys, fire scar dating, and archival documents. This data contains four types of mapping as well as fire regime mapping: • **Detailed fire mapping, from 1976 to today**. This mapping includes burn types, total burn and partial burn, when information is available. In addition, for fires that have been characterized, information on the classes of burning patterns is added. The minimum mapping area can be up to 0.1 ha, depending on the source products used. This map is partially available for areas located in the north of southern Quebec. • **Mapping the simplified contours of fires, from 1972 to today**. This map shows the external contours of fires (without fragmentation), in order to represent them globally in a product that can be easily used and integrated into current information systems, GPS or others. Resulting from the fusion of detailed fire mapping, this product was designed to meet various customer needs. This map is partially available for sectors located in the north of southern Quebec. • **The mapping of fire origins** having been listed by protection organizations (e.g.: SOPFEU) for the period from 1972 to today. This mapping includes the date, the source of ignition (human or lightning) and the protection zone. It is available for all of Quebec. • **The mapping of ancient fires concerns fires that occurred between the very end of the 19th century and 1975**. This mapping comes from the information present on the forest maps of the first and second inventories, as well as from the information contained on the ecoforest maps of the third and fourth inventories. The dating of these fires is done using various methods, including the analysis of study trees bearing fire scars and the consultation of archival documents. This data is available for the following regions: Saguenay-Lac-Saint-Jean (02), Bas-Saint-Laurent (02), Bas-Saint-Laurent (01), Gaspésie-Îles-de-la-Madeleine (11), Abitibi-Témiscamingue (08), Mauricie-Centre-du-Québec (04-17), and Lanaudière-Laurentides (04-17), and Lanaudière-Laurentides (14-15). • **Mapping fire regimes in southern Québec**. This map shows 13 zones with distinct fire regimes. These areas were delineated based on available information on the areas burned during the period 1890-2020 and other potentially decisive environmental variables, such as physiography, the abundance of different tree species known to be dependent on fire as well as the location of natural and anthropogenic ignitions. Fire regime mapping covers all forest areas under management as well as a more northern portion that is not managed. The detailed methodology is presented in Forest Research Paper no. 189 “Zoning fire regimes in southern Quebec” (coming soon). This zoning may be useful to ensure better consideration of the risk of fire in a forest management context. It can also serve as a territorial basis for projecting future fire activity taking into account various factors, such as climate change, fire suppression as well as changes in the types of fuels and their distribution on the territory.**This third party metadata element was translated using an automated translation tool (Amazon Translate).**

__The link: *Access the data directory* is available in the section*Dataset Description Sheets; Additional Information*__. The original ecoforest map and the results of the 4th ecoforest inventory of southern Quebec constitute a grouping of ecoforest data including the original ecoforest map of the 4th inventory and numerous other tables providing information directly related to ecoforest populations. The information in this dataset corresponds to the forest profile up to the year of aerial photography. Among the numerous tables and classes of entities that the product brings together, the following groups can be distinguished: * The original ecoforest map of the 4th inventory made up of ecoforest polygons. This is the geographic base to which all other data are attached; * The forest compilations of the 4th inventory which contain, among other things, the gross commercial volumes evaluated by nature; * The ecological classification of Quebec territory; * The characterization data of forest stations. __Note that__ the original ecoforest map of the 4th inventory has been complete since 2018 and that no new mapping has been added. This differs from the current original ecoforest map where, each year, a portion of Quebec's territory is photo-interpreted and integrated into the provincial product by replacing the cartographic information from the previous inventory. In addition, some areas have not been mapped since the 3rd inventory and are therefore absent from the original ecoforest map from the 4th inventory.**This third party metadata element was translated using an automated translation tool (Amazon Translate).**