Automatically Extracted Features

Feature Catalogue, version 1.1

Produced by Natural Resources Canada

January 5th 2023

© His Majesty the King in Right of Canada, as represented by the Minister of Natural Resources,2023

To have more information on copyright, contact Natural Resources at the following address nrcan.copyrightdroitdauteur.rncan@canada.ca.

Introduction

This document describes features of a dataset. It has three main sections: definition of common attributes for all features, definition of features and attributes, and domains of permissible values for specific attributes. Each section starts with an explanation of the content and conventions used in the section. Finally, a correlation tables for various distribution formats is presented at the end of the document.

This feature catalogue provides additional information on the data for the dataset, available in both French and English versions.  In both language version of the catalogue, the feature and attribute names are provided in both languages.

Attribute names are expressed using natural wording, according to the language of the catalogue, however the implementation name is always in English.  For example, “Centrale électrique” and “Power Plant” will be displayed in the French and English catalogues respectively, however the implementation name will be in English as “power_plant_0”.  In the majority of cases, the attribute name will be similar to the implementation name.

In the tables that describe features and attributes, map scales are provided in their abbreviated form, e.g. 250K for 1:250 000, 1M for 1:1 000 000, 5M for 1:5 000 000, etc…

It should be noted that some attributes have a domain of allowed values which makes it possible to limit the possible values for the attribute.  These attributes always contain numeric values to which a designation is associated.  For reasons of user-friendliness, each of these attributes having a domain of permitted values has been triplicated to provide the user with the English or French designations in addition to the numerical value.  In order not to weigh down the catalog of entities, it was decided not to list these attributes "*-English" and "*-French".  For example, only the "Map Selection" attribute is listed in the Common Attributes and only the "Principal Energy Source" attribute is listed in the "Power Plant" entity.

In this document, hyperlinks are identified by the same font style generally used for web pages.

Common Attribute Definitions

Common attributes are defined only once and usually exist in all features. Those attributes that exist in all features are preceded by an asterisk “*”.  For example, the attribute “*GDB Identifier” is present in every feature while “Map Selection” is missing in some.

In the following table, each attribute is completely defined by two rows. Each new attribute begins with an orange row that contains the attribute name in the catalogue’s language, its translation in the other official language between parenthesis, and the data type.  The second row, displays the attribute’s definition, a link to the distribution information, and the scales in which it is available.

Some attributes have a domain of permissible values.  The data type of these attributes has a hyperlink to the section “Domains of Permissible Values.

Attributes listed below are organized alphabetically.

Acquisition TechniqueTechnique d'acquisition Small Integer
Type of data source or technique used to create or update the object. The attribute value is a numeric code.

Distribution Information

Scale

50K
Date MaximumDate supérieure Characters(20)
End date of the period covered by the content of the data set from which the spatial representation of the object is derived.

Distribution Information

Scale

50K
Date MinimumDate inférieure Characters(20)
Start date of the period covered by the content of the data set from which the spatial representation of the object is derived.

Distribution Information

Scale

50K
Feature IdentifierIdentifiant de l'entité Characters(36)
Unique feature identifier.

Distribution Information

Scale

50K
Horizontal Positional Accuracy MaximumPrécision planimétrique maximale Double
Upper bound of horizontal positional accuracy or position error estimate of the object expressed in metres as a circular map accuracy standard (CMAS).

Distribution Information

Scale

50K
Horizontal Positional Accuracy MinimumPrécision planimétrique minimale Double
Lower bound of horizontal positional accuracy or position error estimate of the object expressed in metres as a circular map accuracy standard (CMAS).

Distribution Information

Scale

50K
Metadata IdentifierIdentifiant de métadonnées Characters(36)
Identifier of the metadata describing a feature occurrence.

(Attribute not distributed)

Scale

50K
ProviderFournisseur Small Integer
Type of the agency that generated or revised the data at the very source of the object. The attribute value is a numeric code.

Distribution Information

Scale

50K
Vertical Positional Accuracy MaximumPrécision altimétrique maximale Double
Upper bound of vertical positional accuracy or position error estimate of the object expressed in metres as a linear map accuracy standard (LMAS).

Distribution Information

Scale

50K
Vertical Positional Accuracy MinimumPrécision altimétrique minimale Double
Lower bound of vertical positional accuracy or position error estimate of the object expressed in metres as a linear map accuracy standard (LMAS).

Distribution Information

Scale

50K

Features and Their Attribute Definitions

Features along with its attributes are displayed in separate tables, both listed in alphabetical order.

The first row of the table, in blue, displays the feature name, its translation in the other official language between parenthesis, and its status (Active or Inactive).  A feature that is inactive means that it is deprecated and will not be maintained. The second row, under the feature name, displays the feature definition, link to its distribution information and or displaying information on the web site. The right section of the second row, lists the scales at which it is present and its corresponding geometry representation (P for Point, L for Line, S for Polygon, X for No geometry).

Subsequent rows in the table define the feature’s attributes, where each attribute is completely defined in two rows. Each new attribute begins with an orange row that contains the attribute name in the catalogue’s language, its translation in the other official language between parenthesis, and the data type.  The second row, displays the attribute’s definition, a link to the distribution information, and the scales in which it is available.  Some attributes have a domain of permissible values; therefore, the data type contains a hyperlink to its permissible value.

Each entity and each attribute contains a hyperlink to the Overview Distribution Formats.

Auto BuildingBâtiment auto Active
Polygon building footprint automatically extracted from airborne Lidar data, high resolution optical imagery or other sources.

Distribution Information

ScaleGeometry

50KS
Building AreaSuperficie du bâtiment Double
Area of the building in square metres.

Distribution Information

Scale

50K
CommentCommentaire Characters(512)
Comment indicating different problems.

Distribution Information

Scale

50K
Elevation MaximumÉlévation maximale Double
Maximum elevation at the base of the building in metres.

Distribution Information

Scale

50K
Elevation MinimumÉlévation minimale Double
Minimum elevation at the base of the building in metres.

Distribution Information

Scale

50K
Estimated quality accorgind to the source dataQualité estimée de la donnée en fonction de la source Small Integer
Estimated quality level according to the source dataset.

Distribution Information

Scale

50K
Height MaximumHauteur maximale Double
Maximum height of the building in metres.

Distribution Information

Scale

50K
Height MinimumHauteur minimale Double
Minimum height of the building in metres.

Distribution Information

Scale

50K

Domains and Permissible Values

Domains along with its permissible values are displayed in separate tables, listed in alphabetical order.

The first row of each table, in green, displays the domain name and its translation in the other official language between parenthesises. The second row is a header row for all subsequent rows that lists domain values, always as integer values, followed by its English and French designation, and the definition of the value.  For example, for the “Principal Energy Source” domain, its permissible values are “20, 1325, 1326, etc”.  Value “20” means “Not Identified (or “Non identifié” in French), and its definition is “Unknown, not listed, not applicable or impossible to determine”.

Acquisition Technique CodelistListe de codes de technique d'acquisition
Values English Designation French Designation Definition
20 Not Identified Non identifié Unknown, not listed, not applicable or impossible to determine.
449 Aerial Photo Photographie aérienne Aerial photography not orthorectified.
450 Computed Calculé Geometric information that has been computed (not captured).
451 Digital Elevation Model Modèle numérique d'élévation Data coming from a Digital Elevation Model (DEM).
452 Field Completion Complètement terrain Information gathered from people directly on the field.
453 GPS GPS Data collected using a Global Positioning System (GPS) device.
454 Orthoimage Ortho-image Satellite imagery orthorectified.
455 Orthophoto Orthophoto Aerial photography orthorectified.
456 Paper Map Carte papier Conventional sources of information like maps or plans.
457 Raster Data Données matricielles Data resulting from a scanning process.
458 Raw Imagery Image brute Satellite imagery not orthorectified.
459 Vector Data Données vectorielles Vector digital data.
1359 Geocoded Géocodé Data coming from a geocoding process.
1360 Lidar Lidar Data coming from Lidar.
Provider CodelistListe de codes de fournisseur
Values English Designation French Designation Definition
20 Not Identified Non identifié Unknown, not listed, not applicable or impossible to determine.
460 Federal Fédéral Federal departments or agencies
461 Municipal Municipal Municipal departments or agencies
462 Private Privé Private sector organization or agency
463 Provincial-Territorial Provincial-Territorial Provincial or territorial departments or agencies
Estimated quality levels according to the source data CodelistListe de codes des niveaux de qualité estimés en fonction de la donnée source
Values English Designation French Designation Definition
23 Excellent Excellent Refer to section 7.1 of the product specifications
24 Good Bon Refer to section 7.1 of the product specifications
25 Fair Moyen Refer to section 7.1 of the product specifications
26 Poor Faible Refer to section 7.1 of the product specifications
27 Very poor Très faible Refer to section 7.1 of the product specifications

Correlation Tables

Features and their attributes are distributed in four data formats: ESRI Geodatabase (FGDB), ESRI shape files (SHAPE), OGC GeoPackage, and web services.

A correlation table is used for each distributed format where features are indicated in blue and attributes in orange. Attributes whose values correspond to a domain have a hyperlink on their data type to their permissible values.  Those attributes that are not distributed due to format constraints, in the columns “Name…” and “Data Type”, is added a reference to a footnote.  For example, for the attribute “GDB Identifier”, columns “Name in FGDB File” and “Data type” contain “gdb_identifier1” and “Text(64)1” respectively.

In the dataset, attributes with a domain of values are triplicated to explicitly provide the corresponding English and French designations. These attributes therefore have the suffixes "_en" and "_fr".  For example, for the "principal_energy_source" attribute, the "principal_energy_source_fr" and "principal_energy​_source_en" attributes are also provided.  Although in the tables below, these attributes are not listed, you can assume that they will be provided in the datasets.  In the case of FGDB files, the designations have been concatenated to the numeric value of the attribute so there are no "*_en" and "*_fr" attributes.  For example, the value of the "principal_energy_source" attribute will be "20: Not Identified / Not Identified".  For Shape files, because of the 10-character limit for the name of an attribute, it is possible that the suffixes are only "fr" and "en".  For example, the "main energy source" attribute is named "prsrcdsc" and its attributes for the French and English designations are named "prsrcdscfr" and "prsrcdscen".

Feature names have embedded a hyperlink to the complete definition in the feature table, whereas attributes do not.

The column “Name in…” lists the corresponding name of the feature and attribute that are in the dataset, and on the web site.

The column “Data Type” lists the data or field type of the attribute according to its format.

FGDB Distribution Format

Name of Feature/Attribute Name in FGDB File Data Type
Auto Building auto_building_2 Polygon Features
Acquisition Technique acqtech Short Integer
Building Area bldgarea Double
Comment comment Text(512)
Date Maximum datemax Text(20)
Date Minimum datemin Text(20)
Elevation Maximum elevmax Double
Elevation Minimum elevmin Double
Estimated quality according to the source data qltylvl Short Integer
Feature Identifier feature_id Text(36)
Height Maximum heightmax Double
Height Minimum heightmin Double
Horizontal Positional Accuracy Maximum haccmax Double
Horizontal Positional Accuracy Minimum haccmin Double
Metadata Identifier md_id Text(36)
Provider provider Short Integer
Vertical Positional Accuracy Maximum vaccmax Double
Vertical Positional Accuracy Minimum vaccmin Double

SHAPE Distribution Format

Name of Feature/Attribute Name in Shape File Data Type
Auto Building auto_building_2 Polygon Features
Acquisition Technique acqtech Integer
Building Area bldgarea Float
Comment comment Text(512)
Date Maximum datemax Text(20)
Date Minimum datemin Text(20)
Elevation Maximum elevmax Float
Elevation Minimum elevmin Float
Estimated quality according to the source data qltylvl Integer
Feature Identifier feature_id Text(36)
Height Maximum heightmax Float
Height Minimum heightmin Float
Horizontal Positional Accuracy Maximum haccmax Float
Horizontal Positional Accuracy Minimum haccmin Float
Metadata Identifier md_id Text(36)
Provider provider Integer
Vertical Positional Accuracy Maximum vaccmax Float
Vertical Positional Accuracy Minimum vaccmin Float

GeoPackage Distribution Format

Name of Feature/Attribute Name in GeoPackage File Data Type
Auto Building auto_building_2 Polygon Features
Acquisition Technique acqtech Short Integer
Building Area bldgarea Double
Comment comment Text(512)
Date Maximum datemax Text(20)
Date Minimum datemin Text(20)
Elevation Maximum elevmax Double
Elevation Minimum elevmin Double
Estimated quality according to the source data qltylvl Short Integer
Feature Identifier feature_id Text(36)
Height Maximum heightmax Double
Height Minimum heightmin Double
Horizontal Positional Accuracy Maximum haccmax Double
Horizontal Positional Accuracy Minimum haccmin Double
Metadata Identifier md_id Text(36)
Provider provider Short Integer
Vertical Positional Accuracy Maximum vaccmax Double
Vertical Positional Accuracy Minimum vaccmin Double

WEB Distribution Format

Name of Feature/Attribute Name in Web Services
Auto Building Auto Building
Acquisition Technique Acquisition Technique
Building Area Building Area
Comment Comment
Date Maximum Date Maximum
Date Minimum Date Minimum
Elevation Maximum Elevation Maximum
Estimated quality according to the source data Estimated quality according to the source data
Elevation Minimum Elevation Minimum
Feature Identifier Feature Identifier
Height Maximum Height Maximum
Height Minimum Height Minimum
Horizontal Positional Accuracy Maximum Horizontal Positional Accuracy Maximum
Horizontal Positional Accuracy Minimum Horizontal Positional Accuracy Minimum
Metadata Identifier Metadata Identifier
Provider Provider
Vertical Positional Accuracy Maximum Vertical Positional Accuracy Maximum
Vertical Positional Accuracy Minimum Vertical Positional Accuracy Minimum

Overview of all Distribution Formats

Name of Feature/Attribute Distribution/Viewing
Name in FGDB File Data Type Name in Shape File Data Type Name in GeoPackage File Data Type Name in Web Services
Auto Building auto_building_2 Polygon Features auto_building_2 Polygon Features auto_building_2 Polygon Features Auto Building
Acquisition Technique acqtech Short Integer acqtech Integer acqtech Short Integer Acquisition Technique
Building Area bldgarea Double bldgarea Float bldgarea Double Building Area
Comment comment Text(512) comment Text(512) comment Text(512) Comment
Date Maximum datemax Text(20) datemax Text(20) datemax Text(20) Date Maximum
Date Minimum datemin Text(20) datemin Text(20) datemin Text(20) Date Minimum
Elevation Maximum elevmax Double elevmax Float elevmax Double Elevation Maximum
Elevation Minimum elevmin Double elevmin Float elevmin Double Elevation Minimum
Estimated quality according to the source data qltylvl Short Integer qltylvl Integer qltylvl Short Integer Estimated quality according to the source data
Feature Identifier feature_id Text(36) feature_id Text(36) feature_id Text(36) Feature Identifier
Height Maximum heightmax Double heightmax Float heightmax Double Height Maximum
Height Minimum heightmin Double heightmin Float heightmin Double Height Minimum
Horizontal Positional Accuracy Maximum haccmax Double haccmax Float haccmax Double Horizontal Positional Accuracy Maximum
Horizontal Positional Accuracy Minimum haccmin Double haccmin Float haccmin Double Horizontal Positional Accuracy Minimum
Metadata Identifier md_id Text(36) md_id Text(36) md_id Text(36) Metadata Identifier
Provider provider Short Integer provider Integer provider Short Integer Provider
Vertical Positional Accuracy Maximum vaccmax Double vaccmax Float vaccmax Double Vertical Positional Accuracy Maximum
Vertical Positional Accuracy Minimum vaccmin Double vaccmin Float vaccmin Double Vertical Positional Accuracy Minimum