TUTORIAL ARC GIS GETTING TO KNOW ARCGIS DESKTOP
Chapter 2: Manage Catalog of data PART 1
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| Tutorial ArcGIS: Manage Catalog of data PART 1 |
The Catalog tree
Similar to Windows Explorer- The icons and the Content tab: help identify/different types of data
- Function drag: To Arc Toolbox ™/To Arc Map ™
Each connection is a tree that allows the user to access data sources and files.
You can drag the catalog data sources to the application to the Arc Map ™
View or drag it to the Arc Toolbox ™ application for use as a parameter treatment.
Different types of data formats
Currently, there is no specific data format for Geographic Information Systems.
Each GIS software company has developed its own data format.
Chap files
Geodatabases
Create a data storage structure
The different types of structures that can be created are:
The images may be composed of one or more layers of digital information and may be
georeferenced or not. Georeferenced images can be displayed with other layers ArcMap while non-georeferenced images are typically used as carrier map or as linked images.
View or drag it to the Arc Toolbox ™ application for use as a parameter treatment.
Data formats
Different types of data formats
Currently, there is no specific data format for Geographic Information Systems.
Each GIS software company has developed its own data format.
Arc GIS is capable of Support all data formats developed by ESRI:
- shapefiles, coverage, grids, and geodatabases.
- Large data formats CAD / CAM (DXF, DGN, and DWG) and a large number of image data formats are also supported. So you can work on multiple data sources without the need to convert your data in a single format.
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Chap files
Simple Feature Class/No datasets mechanism feature /the attributes are stored in a table Dbase
The shapefile is the native file format of GIS Arc View.
It allows the storage of the geometry Attribute data and geographic features. The geometry of a feature is recorded as Shape composed of a set of vector coordinates (point, line, and polygon).
It allows the storage of the geometry Attribute data and geographic features. The geometry of a feature is recorded as Shape composed of a set of vector coordinates (point, line, and polygon).
Format
The three files created by Arc View are distinguished by the following extensions:
Formats and .sbn .sbx files are used to index the spatial data; .ain and serve .aix to index
attribute data. If your layer has a defined coordinate system, spatial information is
stored in a .prj file.
- .shp- stores the feature geometry (shape and coordinates).
- .shx- stores the index of the feature geometry.
- .dbf- dBase file storing attribute data entities.
Formats and .sbn .sbx files are used to index the spatial data; .ain and serve .aix to index
attribute data. If your layer has a defined coordinate system, spatial information is
stored in a .prj file.
Followed naming conventions shapefiles
Arc View automatically gives the .shp extension to any new shapefile. Taking a
shapefile named areas, the theme will be called Zones.shp, and other files will be named
Zones.shx, Zones.dbf, Zones.sbn, Zones.sbx, Zones.ain and Zones.aix. Other index files can be created by Arc GIS.
shapefile named areas, the theme will be called Zones.shp, and other files will be named
Zones.shx, Zones.dbf, Zones.sbn, Zones.sbx, Zones.ain and Zones.aix. Other index files can be created by Arc GIS.
Classes Simple Features
A shapefile can store only one type of entities: points, lines or polygons.
However, the same object can be stored in two forms in two files of various forms. By Example, a river may be represented as a linear feature in a pattern file and in The form of a polygon feature representing the major bed in a second shapefile. The file Forms do not allow storing topology information.
However, the same object can be stored in two forms in two files of various forms. By Example, a river may be represented as a linear feature in a pattern file and in The form of a polygon feature representing the major bed in a second shapefile. The file Forms do not allow storing topology information.
Attributes
The attributes are stored in a file in dBase format with the same name as the file containing the spatial data, but that is assigned the .dbf extension.
Blankets
Dataset entities: Storage in a directory / Topology Management
The cover is one of the vector formats native Arc Info. This format consists of a directory
Containing the files that store the spatial information and attribute entities associated with a zone-specific geographic.
The covers can be changed only with a license in Arc Map Arc Info workstation.
Containing the files that store the spatial information and attribute entities associated with a zone-specific geographic.
The covers can be changed only with a license in Arc Map Arc Info workstation.
A dataset
A cover acts as a class feature set containing one or more feature classes.
For example, a coverage representing land use can store both polygon features
Representing the occupation zones and linear features representing boundaries of the zones of occupation Off the ground.
Polygons and lines have separate attribute tables but sharing elements
Geometric. It is also possible to store in the same coverage of dots and lines (and their
Attributes). However, they do not share their geometry. For against, it is not possible in the same Coverage store both points and polygons.
For example, a coverage representing land use can store both polygon features
Representing the occupation zones and linear features representing boundaries of the zones of occupation Off the ground.
Polygons and lines have separate attribute tables but sharing elements
Geometric. It is also possible to store in the same coverage of dots and lines (and their
Attributes). However, they do not share their geometry. For against, it is not possible in the same Coverage store both points and polygons.
Topological structure
Unlike shapefiles, blankets store topology information (length,
area, perimeter, adjacency relationships, and connectivity) in a table. For example, blanket
containing a linear feature class has length and connectivity attributes defined in a
.aat file with the extension.
area, perimeter, adjacency relationships, and connectivity) in a table. For example, blanket
containing a linear feature class has length and connectivity attributes defined in a
.aat file with the extension.
The polygon feature classes will store surface information and
perimeter in a .pat file. The covers containing both line and polygon features
will store adjacency information in a .aat file. For more information see the
Online help topic.
perimeter in a .pat file. The covers containing both line and polygon features
will store adjacency information in a .aat file. For more information see the
Online help topic.
different types of entities
Shapefiles and blankets
Feature Class:
A feature class (in English Feature class) is a set of entities of the same type (point, line,
polygon, annotation, ...). An entity class has an attribute table in which are stored the
attributes of each entity.
polygon, annotation, ...). An entity class has an attribute table in which are stored the
attributes of each entity.
Class feature set:
A feature dataset (English Feature DataSet) is a collection of feature classes. This
all permits, with ArcMap, manage topological relations between entities of different classes.
All feature classes of a class set are stored in the same spatial reference. This is
defined during the creation of the dataset.
all permits, with ArcMap, manage topological relations between entities of different classes.
All feature classes of a class set are stored in the same spatial reference. This is
defined during the creation of the dataset.
ArcView shapefiles:
ArcView shapefiles contain a single type of entities (points, lines or polygons). They
thus appear as a feature class.
thus appear as a feature class.
ArcInfo coverages:
The ArcInfo coverages contain several types of entities (nodes, arcs, polygons, regions,
annotations,...) Which have topological relationships?
They, therefore, appear in the form of a dataset.
annotations,...) Which have topological relationships?
They, therefore, appear in the form of a dataset.
Geodatabases
Stores feature classes or games feature classes
Table RDBMS stores the feature classes and attributes
Personal geodatabases / SDE geodatabases
Table RDBMS stores the feature classes and attributes
Personal geodatabases / SDE geodatabases
The geodatabase is the native format of all ArcGIS applications. It stores the data points,
line or polygon in RDBMS tables such as Access or Oracle.
ArcEditor and ArcInfo can create, update or delete ArcSDE geodatabases (stored in Oracle) and feature classes from personal geodatabases.
ArcView can create, update or delete entities from personal geodatabases use entities from an ArcSDE geodatabase to make queries, joins or links but has no function of creation, editing, and deletion.
line or polygon in RDBMS tables such as Access or Oracle.
ArcEditor and ArcInfo can create, update or delete ArcSDE geodatabases (stored in Oracle) and feature classes from personal geodatabases.
ArcView can create, update or delete entities from personal geodatabases use entities from an ArcSDE geodatabase to make queries, joins or links but has no function of creation, editing, and deletion.
Store datasets of entities
Each feature class after geodatabases can only store simple type entities, but you can easily group them into classes of entity sets as they are expressed in the same coordinate system.
As for blankets, geodatabase feature classes are topological.
A geometric network creates connectivity patterns between objects. You can also create your own entities such as complex custom electrical connections with their own behavior.
For now, the rules of validity, versioning system, see Help in ArcGIS Online.
A geometric network creates connectivity patterns between objects. You can also create your own entities such as complex custom electrical connections with their own behavior.
For now, the rules of validity, versioning system, see Help in ArcGIS Online.
Geodatabases
The term of reference to a geodatabase data storage system. Two physical systems used to implement a geodatabase: personal geodatabases and ArcSDE geodatabases.
Their personal geodatabase manages small-scale projects and is stored in .mdb files.
You do not have to need any other software to create and manage this type of geodatabase.
ArcSDE geodatabases used to store and manage large databases and are stored in one of the formats of Supported RDBMS (Oracle, for example). These Geodatabases require an interface between the software office and the RDBMS that you have chosen. Given these physical necessities, you can
perform the same display operations, query, and analysis of the two types of geodatabases.
Store feature classes and datasets feature: Dataset/Feature class
Their personal geodatabase manages small-scale projects and is stored in .mdb files.
You do not have to need any other software to create and manage this type of geodatabase.
ArcSDE geodatabases used to store and manage large databases and are stored in one of the formats of Supported RDBMS (Oracle, for example). These Geodatabases require an interface between the software office and the RDBMS that you have chosen. Given these physical necessities, you can
perform the same display operations, query, and analysis of the two types of geodatabases.
Store feature classes and datasets feature: Dataset/Feature class
The function of the feature datasets is identical to that blankets: Set classes of entities Feature classes can exist in or out of a dataset feature
The geodatabases:
The game geodatabases contain feature classes and feature classes.
Feature classes can be stored in a feature data set or outside of a set of entities.
A dataset is cannot contain another set of classes.
Feature classes can be stored in a feature data set or outside of a set of entities.
A dataset is cannot contain another set of classes.
Create a data storage structure
In ArcCatalog
The different data storage structures are created in ArcCatalog using the New command from the File menu. You also have the option to create a structure in an existing directory calling the Create context menu.
The different types of structures that can be created are:
- Personal geodatabases: Choosing to create this structure, you'll only create a * .mdb file format you will then be able to create feature classes, games classes of entities and/or tables.
- Shapefiles: You will also be able to create shapefiles in * .shp. You will then choose the type of entities that contain this file and possibly a system contact information.
- Layers: You can create, from ArcCatalog, layer files from another existing file. After creating the layer, you have the option to edit all properties via the context menu.
- Group layers: You can also go to ArcCatalog group your layers Group layers.
- The tables * .dbf Format
CAD / CAM files:
AutoCAD files (* .DXF or * .DWG) and MicroStation files (* .DGN) appear as as a class set.
Grids and images:
Raster data appear in the catalog as a set of strips. For GRID
the data is stored on a single tape. In contrast to other types of images, several bands
can be proposed. The list of the codes contained in each band can be visualized using
the Preview tab and the Table option.
the data is stored on a single tape. In contrast to other types of images, several bands
can be proposed. The list of the codes contained in each band can be visualized using
the Preview tab and the Table option.
Tables:
INFO tables, dBASE geodatabases, and the tables can be displayed in ArcCatalog. For the view, their content, use the Preview tab and the Table option.
Your geographic database may contain data from CAD files.
ArcGIS supports files in DXF, DWG, and DGN. You can view and query your data such
they exist in your original file.
To edit spatial data or attribute, it is necessary to convert this data into blankets or geodatabase feature classes.
ArcGIS supports files in DXF, DWG, and DGN. You can view and query your data such
they exist in your original file.
To edit spatial data or attribute, it is necessary to convert this data into blankets or geodatabase feature classes.
Datasets of logical entities
The data management mode from a CAD file in ArcGIS allows to choose and view all the features contained in your source file or a particular type of entities.
Beware though, if you choose to display all the entities contained in the original file, it is impossible to change the symbology assigned to your data or to view the attributes.
Beware though, if you choose to display all the entities contained in the original file, it is impossible to change the symbology assigned to your data or to view the attributes.
Attribute tables
Each feature class contained in a CAD file has an attribute table. This table displays the set of attributes contained in the CAD source file.
A text event table can be a file or a tabular file containing supported by ArcGIS location information on an event or game points that you want to use as ArcMap layer.
Of the table to a point feature class
An event table can have fields containing x, y corresponding to the exact position of the points.
These coordinates can be obtained by reading a map, measuring positions at a glance, by making land surveys or by using a GPS (Global Positioning System).
These Data may belong to any coordinate system and measurement units (longitude-latitude, for example, or meters).
The data used to represent localized on a map data corresponding to geographical positions, but not in a data format space.
These data can come from INFO files, dBASE, or tables from geodatabases. From of pairs of coordinates, ArcGIS is capable of creating dots.
These coordinates can be obtained by reading a map, measuring positions at a glance, by making land surveys or by using a GPS (Global Positioning System).
These Data may belong to any coordinate system and measurement units (longitude-latitude, for example, or meters).
The data used to represent localized on a map data corresponding to geographical positions, but not in a data format space.
These data can come from INFO files, dBASE, or tables from geodatabases. From of pairs of coordinates, ArcGIS is capable of creating dots.
Of the table to a line feature class
You can get the information associated with a route or to a particular track.
Routes have a linear system defined by the user, a system that is independent of the geographic coordinate system. Bus paths can be measured in minutes, the motorways in kilometers, etc.
Routes have a linear system defined by the user, a system that is independent of the geographic coordinate system. Bus paths can be measured in minutes, the motorways in kilometers, etc.
You can use distance measurements stored in an event table to create a spatial representation (point or line) so as to represent these measurements.
To do this, the measures contained in the table must have the same reference system that existing entities.
To do this, the measures contained in the table must have the same reference system that existing entities.
The images may be composed of one or more layers of digital information and may be
georeferenced or not. Georeferenced images can be displayed with other layers ArcMap while non-georeferenced images are typically used as carrier map or as linked images.
All these types of images can be handled with ArcCatalog and can combine metadata.
The common image formats supported by ArcGIS modules BIL, BIP, BMP, GIF, IMG, JPG, LAN, SID, and TIF. An image data set can be simple (one layer) or multiple (one set of layers).
The common image formats supported by ArcGIS modules BIL, BIP, BMP, GIF, IMG, JPG, LAN, SID, and TIF. An image data set can be simple (one layer) or multiple (one set of layers).
Single picture
A single image is an image composed of a single band of information if for example, black and white photographs or scanned documents.
Composite
Color images (satellite images or graphics files, for example) may have more tape. Each band is assigned to an RGB value (red, green or blue) and displayed in color correspondingly.
The combination of RGB values gives the colors displayed.
The combination of RGB values gives the colors displayed.
Images like layer georeferencing
The images in Arc GIS can have many uses. Some, such as aerial photographs, satellite images or scanned images can be geo-referenced, ie possess location information.
You can organize images into the georeferenced catalog. A catalog will display a set of image files as a single image. Raster catalogs contain generally juxtaposed images that cover a wide geographic area (eg a department, a river, a town ...).
You can organize images into the georeferenced catalog. A catalog will display a set of image files as a single image. Raster catalogs contain generally juxtaposed images that cover a wide geographic area (eg a department, a river, a town ...).
Images as attributes
All image data sets are not georeferenced. If an image has no information on geo-referencing, it can be used as a vector attribute entity. For example, you can associate to a cadastral parcel, an image of the corresponding building.
Besides images, ArcGIS applications use the native format as the format of raster data GRID.
There are two types of the gate: the continuous grates and discrete grids. Whatever type of
these grids, the basic structure is the same; they are matrices composed of homogeneous cells.
Their difference between the two grids lies in the nature of the stored values for each cell the grid: the continuous grates store decimal values while the discrete grids store integer values.
To perform some analysis, you can combine the grids in a single data set named "stack" (ie, "gate stack").
There are two types of the gate: the continuous grates and discrete grids. Whatever type of
these grids, the basic structure is the same; they are matrices composed of homogeneous cells.
Their difference between the two grids lies in the nature of the stored values for each cell the grid: the continuous grates store decimal values while the discrete grids store integer values.
To perform some analysis, you can combine the grids in a single data set named "stack" (ie, "gate stack").
The continuous grates
Continuous screens are used to model continuous phenomena on the surface of the earth as altitudes, precipitation...
The discrete grids
The discrete grids are used to represent existing objects on the surface of the globe.
Are used to represent areas of land use, vegetation zones ... A discrete grid has an attribute table called VAT (Value Attribute Table).
Are used to represent areas of land use, vegetation zones ... A discrete grid has an attribute table called VAT (Value Attribute Table).
Tutorial ArcGIS: Manage Catalog of data PART 2
Tutorial ArcGis
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