Hydrocoherent numerical terrain models at the regional scale

Description

### #Des hydrocoherent numerical terrain models (MNT-HC) are also offered south of the 52nd parallel. They are accessible via the [High Resolution Quebec Hydrographic Network Geobase (GRHQ-HR)] (https://www.donneesquebec.ca/recherche/dataset/geobase-du-reseau-hydrographique-du-quebec-a-haute-resolution-grhq-hr) These hydrocoherent numerical terrain models (DTM — HC) offer a regional numerical representation of Quebec relief based on altimetric (altitude) and planimetric (rectangular or geographic) data. They are the result of a collaboration between the Ministry of Natural Resources and Forests (MRNF) and Natural Resources Canada (NRCan) within the framework of the Agreement to produce an up-to-date digital map of northern Quebec and the creation of the product “National Hydro Network (RHN)” for the territory of Quebec. When integrated into a geographic information system, these models allow the implementation of multiple types of spatial analyses such as natural risks, landscape analysis, infrastructure implementation, etc. Hydrocoherent MNTs are obtained as a result of hypsometric and hydrographic data processing that uses the concept of hydrocoherence, which consists in interpolating altimetric values by ensuring a connected drainage network and an accurate representation of ridges and watercourses. The oriented RHN filament makes it possible to grade lakes and to control the altimetric descent of watercourses. The final product is a quality portrait of relief on a scale of 1/50,000. DMTs provide altitude values that are based on a grid with a resolution of 0.324 arcseconds in geographic coordinates, which corresponds to a resolution of about 10 meters in the field.**This third party metadata element was translated using an automated translation tool (Amazon Translate).**

Resources

Name Format Description Link
Directory of NCDs per sheet 1/250,000 Unknown https://diffusion.mern.gouv.qc.ca/Diffusion/RGQ/Matriciel/Elevation/Regional/MNT_HC/GeoTIFF/Tuiles250k/
Download index (csv format) per sheet 1/250,000 CSV https://diffusion.mern.gouv.qc.ca/Diffusion/RGQ/Matriciel/Elevation/Regional/MNT_HC/GeoTIFF/Tuiles250k/Index250k/Index_MNT_250k.csv
Map index per sheet 1/250,000 PDF https://diffusion.mern.gouv.qc.ca/Diffusion/RGQ/Matriciel/Elevation/Regional/MNT_HC/GeoTIFF/Tuiles250k/Index250k/Index_MNT_250k.pdf
Download index (SHP format) per sheet 1/250,000 ESRI Shape https://diffusion.mern.gouv.qc.ca/Diffusion/RGQ/Matriciel/Elevation/Regional/MNT_HC/GeoTIFF/Tuiles250k/Index250k/Index_MNT_250k.zip
Directory of NCDs per sheet 1/50,000 Unknown https://diffusion.mern.gouv.qc.ca/Diffusion/RGQ/Matriciel/Elevation/Regional/MNT_HC/GeoTIFF/Tuiles50k/
Download index (csv format) per sheet 1/50,000 CSV https://diffusion.mern.gouv.qc.ca/Diffusion/RGQ/Matriciel/Elevation/Regional/MNT_HC/GeoTIFF/Tuiles50k/Index50k/Index_MNT_50k.csv
Map index per sheet 1/50,000 PDF https://diffusion.mern.gouv.qc.ca/Diffusion/RGQ/Matriciel/Elevation/Regional/MNT_HC/GeoTIFF/Tuiles50k/Index50k/Index_MNT_50k.pdf
Download index (SHP format) per sheet 1/50,000 ESRI Shape https://diffusion.mern.gouv.qc.ca/Diffusion/RGQ/Matriciel/Elevation/Regional/MNT_HC/GeoTIFF/Tuiles50k/Index50k/Index_MNT_50k.zip
MNT WMS service WMS https://servicesmatriciels.mern.gouv.qc.ca/erdas-iws/ogc/wms/Elevation?SERVICE=WMS&REQUEST=GetCapabilities&layers=Regional_MNT-HC_MNT-HC-REGIONAL&legend_format=image/png&feature_info_type=text/plain
MNT WMS service WMS https://servicesmatriciels.mern.gouv.qc.ca/erdas-iws/ogc/wms/Elevation?SERVICE=WMS&REQUEST=GetCapabilities&layers=Regional_MNT-HC_MNT-HC-REGIONAL&legend_format=image/png&feature_info_type=text/plain
WMTS MNT service Unknown https://servicesmatriciels.mern.gouv.qc.ca/erdas-iws/ogc/wmts/Elevation?SERVICE=WMTS&REQUEST=GetCapabilities
Interactive map of MNT - HC HTML https://vgo.portailcartographique.gouv.qc.ca/mobile.aspx?gpz_point=-7550430.837470898,%20%207155437.875950893&echelle=17471321&epsg=3857&gpz_nomMap=-%20Mod%C3%A8les%20num%C3%A9riques%20de%20terrain
Download card per sheet 1/250,000 HTML https://vgo-telechargement.portailcartographique.gouv.qc.ca/mobile.aspx?gpw=c8803289-62d4-464c-b1ec-edfb6b387fad
Download card per sheet 1/50,000 HTML https://vgo-telechargement.portailcartographique.gouv.qc.ca/mobile.aspx?gpw=e181c1d4-dfdf-466f-bbba-be2da0493290
Original metadata (https://www.donneesquebec.ca) HTML https://www.donneesquebec.ca/recherche/fr/dataset/50ea1add-c7d3-4425-a695-e49618cf7ffe

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