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            <gco:CharacterString>This dataset was compiled using data on bathymetry, substrate type, geomorphic features on the sea floor, and data on the distribution of biogenic features such as kelp, eelgrass, and sponge reefs. 

Bathymetry: The method used to create the bathymetry dataset was compiled using the 3-arc second (~80m) bathymetry Digital Elevation Model (DEM) from NOAA (Carignan et al., 2013), the 100m bathymetry dataset from the BCMCA Atlas  (2011), and a 250m resolution subset of the GMRT v3 global bathymetric dataset (Ryan et al., 2009b). All three datasets were projected to BC Albers NAD 83, clipped to a box slightly bigger than the BC EEZ. and resampled to 80m. The data were then combined using the ArcGIS Spatial Analyst Con (conditional) tool and Raster Calculator to mosaic the datasets together, so that the NOAA 80m overwrites the BCMCA dataset, which in turn overwrites GMRTv3. Once combined, the mosaic was resampled to 100m to reduce any sharp edges between the source layers. A Canadian Pacific EEZ feature class was buffered by 100m, the final 100m mosaic was then clipped to the buffered Canadian Pacific EEZ feature class using the ArcGIS Extract by Mask Spatial Analyst Tool. The 100m mosaic was reclassified into the different depth classes (shallow &lt;30m, shelf 30m-200m, slope 200m-2000m, deep &gt;2000m), and converted into polygons. The final polygon dataset was then clipped with the Pacific Ocean polygon feature class to limit the dataset to the Canadian EEZ. 

Substrate: The substrate dataset was compiled using the BCMCA Atlas benthic classes (2011), the DFO 100m substrate model (Fields et al., 2018 ; Gregr et al. 2021), the Natural Resources Canada (NRCan) surficial geology polygons for Kitimat and Douglas Channel (Shaw &amp; Lintern, 2016), intertidal polygons created by Ian Murfitt (DFO, n.d.) based on CHS charts, and data on the distributions of kelp and eelgrass (British Columbia Marine Conservation Analysis (BCMCA) Project Team, 2011; Proudfoot &amp; Robb, 2021). The 100m substrate model was reclassified to three substrate classes: Soft, Mixed and Hard substrates, and converted to polygons. In order to smooth out the edges of the zones, the raster was resampled to a higher resolution of 50m and run through the Spatial Analyst Boundary Clean Tool. Mixed substrates were generally smaller in area, so the Spatial Analyst Expand tool was applied, increasing Mixed substrate zones by 2 cells to ensure that these smaller zones did not disappear into the larger zones on conversion to polygons. The raster was then converted to polygons (not simplified) using the Raster to Polygon tool and smoothed using the Smooth Shared Edges tool with the PAEK smoothing algorithm and a smoothing tolerance of 1000m. Once the DFO 100m substrates were converted into smoothed polygons, the dataset was combined with substrate information from the BCMCA benthic classes, the NRCan surficial polygons, and substrate information from the Murfitt intertidal polygons. 
The NRCan surficial polygons were classified as soft/mixed/hard based on text descriptions provided (see Appendix for details), and used to refine the substrate model. In areas where substrate is undefined in the NRCan surficial polygons (e.g. dredged areas and bioherms), the data from the DFO 100m substrate model was prioritized. The Murfitt intertidal classes were also classified as soft/mixed/hard based on FCODES (see Table 4), and used to define substrate for areas not covered by the NRCan surficial morphology polygons. Biogenic features such as kelp, eelgrass, and sponge reefs were also used to refine substrate information. Areas where kelp were present were assumed to be hard substrate, while areas with eelgrass and sponge reefs were present were assumed to be soft substrate. Areas where eelgrass and kelp were found to overlap were assumed to be mixed substrate.   

Special features: The seamounts data were available from 2 datasets generated by DFO. Seamounts are underwater mountains with peaks &gt;1 km above the base. The polygon boundaries from the latest seamount modeling were provided by Cherisse Du Preez (DFO, 2021). Underwater ridges and knolls were taken from the Manson Underwater Features dataset (2009), but were reclassified using the following depth classifications – Knolls 500m-100m, Hills &lt;500m (Cherisse Du Preez, DFO, pers. comms.). One exception were the Dellwood Knolls, which were classified as Knolls even though the recorded height in the dataset was &gt; 1000 m. Features identified as Ridges in the Manson Underwater Features dataset (2009) were kept as Ridges. The canyon features were taken from the global geomorphic features dataset generated by Harris et al. (2014). All canyon features (blind, and shelf-incising) within the Pacific EEZ boundary were included in the dataset. The canyon features from the Manson Underwater Features dataset (2009) were not used because those features included only canyons at the shelf break, and not beyond. 

Biogenic Features: Canopy forming kelp – Bull Kelp (Nereocystis luetkeana) and Giant Kelp (Macrocystis pyrifera) – features were obtained from the BCMCA Atlas (2011). These were compiled from various sources from 1897-2008. Survey effort is not consistent across the entire study area. Some areas may be over/underrepresented and some areas with no data may not have been surveyed. Areas where kelp is present are assumed to be shallow (&lt;30m deep), and have hard substrates. Eelgrass features (Zostera marina) were obtained from a dataset representing eelgrass beds in the Pacific Region compiled from various sources (Proudfoot &amp; Robb, 2021). The eelgrass beds feature class originally contained survey features and buffer polygons of different sizes to represent eelgrass areas where only point and line data were available. In some areas, there was a significant amount of overlap between survey polygons and buffer polygons. To preserve the higher level detail where survey polygons were available, we used only the features representing survey polygons and included only buffer polygons that did not overlap with survey polygons. This dataset was built on prior efforts to compile a coastwide eelgrass dataset (BCMCA, 2011) and includes data from various studies and surveys. Some areas may be over/underrepresented and some areas with no data may not have been surveyed. Areas where eelgrass is present are assumed to be shallow (&lt;30m deep) and have soft substrates. The sponge reef features were compiled by Dunham (2018) from features mapped by NRCan and Fisheries and Oceans Canada. The sponges are known to trap fine sediments, forming large bioherms or reef mounds over the span of centuries (Dunham 2018); therefore, sponge reef areas are assumed to have soft substrate.</gco:CharacterString>
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                  <gmd:LocalisedCharacterString locale="#fra">Cet ensemble de données a été compilé à partir de données sur la bathymétrie, le type de substrat, les caractéristiques géomorphiques du fond marin et des données sur la répartition des caractéristiques biogéniques comme le varech, la zostère marine et les récifs d'éponges. 

Bathymétrie : La méthode utilisée pour créer l'ensemble de données bathymétriques a été compilée à l'aide du modèle d'élévation numérique de bathymétrie (DEM) de la NOAA (Carignan et al., 2013), de l'ensemble de données bathymétriques de 100 m de l'Atlas de la BCMCA (2011) et d'un sous-ensemble de données bathymétriques mondiales GMRT v3 (Ryan et Ryan et al., 2013). al., 2009b). Les trois ensembles de données ont été projetés à BC Albers NAD 83, coupés dans une boîte légèrement plus grande que la ZEE de la Colombie-Britannique et rééchantillonnés à 80 m. Les données ont ensuite été combinées à l'aide de l'outil ArcGIS Spatial Analyst Con (conditionnel) et de la Calculatrice Raster pour mettre en mosaïque les ensembles de données ensemble, de sorte que le NOAA 80m remplace l'ensemble de données de la BCMCA, qui à son tour écrase GMRtv3. Une fois combinée, la mosaïque a été rééchantillonnée à 100 m afin de réduire les arêtes vives entre les couches sources. Une classe d'entités de la ZEE du Canadien Pacifique a été tamponnée de 100 m, puis la dernière mosaïque de 100 m a été coupée à la classe d'entités tamponnée de la ZEE du Canadien Pacifique à l'aide de l'outil ArcGIS Extract by Mask Spatial Analyst. La mosaïque de 100 m a été reclassée dans les différentes classes de profondeur (peu profonde de 2 000 m &lt;30m, shelf 30m-200m, slope 200m-2000m, deep &gt;) et convertie en polygones. L'ensemble de données du polygone final a ensuite été coupé avec la classe d'entités polygones de l'océan Pacifique afin de limiter l'ensemble de données à la ZEE canadienne. 

Substrat : L'ensemble de données sur le substrat a été compilé à l'aide des classes benthiques de l'atlas du BCMCA (2011), du modèle de substrat de 100 m du MPO (Fields et al., 2018 ; Gregr et al., 2021), des polygones géologiques de surface de Ressources naturelles Canada (RNCan) pour les chenaux Kitimat et Douglas (Shaw et Lintern, 2016), des polygones intertidaux créés par Ian Murfitt (MPO, 2014). s.d.) d'après les cartes du SHC et les données sur la répartition du varech et de la zostère marine (British Columbia Marine Conservation Analysis (BCMCA) Project Team, 2011 ; Proudfoot et Robb, 2021). Le modèle de substrat de 100 m a été reclassé en trois classes de substrat : les substrats mous, mixtes et durs, et converti en polygones. Afin de lisser les bords des zones, le raster a été rééchantillonné à une résolution plus élevée de 50 m et a été utilisé à l'aide de l'outil de nettoyage des limites de l'analyste spatial. Comme les substrats mixtes étaient généralement plus petits, on a utilisé l'outil Expand Analyst Spatial Analyst Expand, ce qui a permis d'augmenter les zones de substrat mixte de 2 cellules afin de s'assurer que ces zones plus petites ne disparaissent pas dans les zones plus grandes lors de la conversion en polygones. Le raster a ensuite été converti en polygones (non simplifiés) à l'aide de l'outil Raster to Polygon et lissé à l'aide de l'outil Smooth Shared Edges avec l'algorithme de lissage PAEK et une tolérance de lissage de 1 000 m. Une fois que les substrats de 100 m du MPO ont été convertis en polygones lissés, l'ensemble de données a été combiné avec l'information sur le substrat des classes benthiques de la BCMCA, les polygones de surface de RNCan et l'information sur le substrat provenant des polygones intertidaux de Murfitt. 
Les polygones superficiels de RNCan ont été classés comme étant mous, mixtes ou durs d'après les descriptions de texte fournies (voir l'annexe pour plus de détails) et utilisés pour peaufiner le modèle de substrat. Dans les zones où le substrat n'est pas défini dans les polygones de surface de RNCan (p. ex. les zones draguées et les bihermes), les données du modèle de substrat de 100 m du MPO ont été classées par ordre de priorité. Les classes intertidales de Murfitt ont également été classées comme étant souples, mixtes/dures d'après les FCODES (voir le tableau 4) et utilisées pour définir le substrat pour les zones non couvertes par les polygones morphologiques de surface de RNCan. Des caractéristiques biogéniques comme le varech, la zostère marine et les récifs d'éponges ont également été utilisées pour raffiner l'information sur le substrat. On a supposé que les zones où le varech était présent étaient des substrats durs, tandis que les zones abritant des zostères et des récifs d'éponges étaient des substrats mous. On a supposé que les zones où la zostère zostée et le varech se chevauchaient étaient des substrats mixtes. 

Particularités : Les données sur les monts sous-marins étaient disponibles à partir de 2 ensembles de données générés par le MPO. Les monts sous-marins sont des montagnes sous-marines dont les sommets se situent à plus de 1 km au-dessus de la base. Les limites des polygones de la dernière modélisation du niveau sous-marin ont été fournies par Cherisse Du Preez (MPO, 2021). Les crêtes et les buttes sous-marins ont été tirés de l'ensemble de données sur les caractéristiques sous-marines de Manson (2009), mais ont été reclassés à l'aide des classifications de profondeur suivantes : Knolls 500 m à 100 m, collines &lt; 500 m (Cherisse Du Preez, MPO, comm. pers.). Les Knolls de Dellwood font exception, qui ont été classés comme des Knolls, même si la hauteur enregistrée dans l'ensemble de données était supérieure à 1 000 m. Les entités identifiées comme étant des crêtes dans l'ensemble de données sur les caractéristiques sous-marines de Manson (2009) ont été conservées comme Ridges. Les caractéristiques du canyon ont été tirées de l'ensemble de données sur les caractéristiques géomorphiques mondiales généré par Harris et al. (2014). Toutes les caractéristiques du canyon (aveugle et incisation du plateau) à l'intérieur des limites de la ZEE du Pacifique ont été incluses dans l'ensemble de données. Les caractéristiques du canyon de l'ensemble de données sur les caractéristiques sous-marines de Manson (2009) n'ont pas été utilisées parce qu'elles ne comprenaient que des canyons au rebord de la plate-forme, et non au-delà. 

Caractéristiques biogéniques : Le varech formant le couvert forestier — le varech à tête plate (Nereocystis luetkeana) et le varech géant (Macrocystis pyrifera) — ont été obtenus à partir de l'Atlas de la BCMCA (2011). Ces données ont été compilées à partir de diverses sources de 1897 à 2008. Les activités de relevé ne sont pas uniformes dans l'ensemble de la zone d'étude. Certaines régions peuvent être surreprésentées ou sous-représentées, et certaines régions n'ayant pas de données n'ont pas fait l'objet de relevés. On présume que les zones où le varech est présent sont peu profondes (&lt; 30 m de profondeur) et ont des substrats durs. Les caractéristiques de la zostère marine (Zostera marina) ont été obtenues à partir d'un ensemble de données représentant les herbiers de zostère marine de la région du Pacifique compilé à partir de diverses sources (Proudfoot et Robb, 2021). La classe d'entités des herbiers de zostère marine contenait à l'origine des caractéristiques des relevés et des polygones tampons de tailles différentes pour représenter les zones de zostère où seules des données ponctuelles et linéaires étaient disponibles. Dans certaines régions, il y avait un chevauchement important entre les polygones de relevé et les polygones tampons. Pour préserver les détails de plus haut niveau là où les polygones d'enquête étaient disponibles, nous avons utilisé uniquement les entités représentant les polygones de relevé et n'avons inclus que les polygones tampons qui ne chevauchaient pas les polygones de relevé. Cet ensemble de données s'appuie sur des efforts antérieurs visant à compiler un ensemble de données sur la zostère marine (BCMCA, 2011) et comprend des données provenant de diverses études et relevés. Certaines régions peuvent être surreprésentées ou sous-représentées, et certaines régions n'ayant pas de données n'ont pas fait l'objet de relevés. On présume que les zones où la zostère zostère est présente sont peu profondes (&lt; 30 m de profondeur) et ont des substrats mous. Les caractéristiques du récif d'éponges ont été compilées par Dunham (2018) à partir d'éléments cartographiés par RNCan et Pêches et Océans Canada. On sait que les éponges piègent les sédiments fins et forment de gros biorermes ou monticules récifaux sur une période de siècles (Dunham, 2018) ; par conséquent, on suppose que les zones de récifs d'éponges ont un substrat mou.</gmd:LocalisedCharacterString>
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