ArcGIS for desktop Getting Started tutorial _ fifth _arccatalog Use-ArcGIS know-Next generation ArcGIS Quiz community

Original: ArcGIS for desktop Getting Started tutorial _ fifth _arccatalog Use-ArcGIS know-Next generation ArcGIS Quiz community

1 Arccatalog Use
1.1 GIS Data
Geographic Information System (GIS) is to abstract real figures or geographic phenomena into simple collection types (such as dots, lines, polygons) that can be expressed by computers, and then classify them by their geometry type and thematic information, and manage and analyze the data by computer technology. From the organization of data, we usually divide it into two categories: vector data and raster data.



As shown, a motorway is expressed in the form of vectors and rasters, respectively. We can clearly find the comparison between vector data and raster data.


1.2 Introduction to common vector data
In ArcGIS, common vector data is coverage, Shapefiles, and Geodatabase. These are native data formats for ArcGIS, so most of them are used in ArcGIS, as detailed in the following table:


The data in coverage format of the yellow tone icon is the native vector data format of the early ArcInfo workstation. Now in ArcGIS for desktop, only the display and conversion of this format data is supported, and editing of this format data is no longer supported.

The green tone icon in arccatalog format and the gray-tone icon geodatabase formatted data are two of the most commonly editable vector data formats used in ArcGIS for desktop.



However, when you look at these geographic data in Windows Resource management, we find that they are not as shown in Arccatalog. In Shapefiles, for example, the same data, shown in Arccatalog as a green icon in Shapefile data, when viewed under Windows Explorer, finds several files with the same name under the same path.



GIS data often has its own special data structure and is often composed of multiple files, which are generally unrecognized in Windows Explorer. Therefore, we strongly recommend that users develop good usage habits, using Arccatalog as a geographic data explorer, in Arccatalog to complete the creation of geographic data, organization, management (copy, paste, raster, rename) and so on to the maximum possible maintenance of data integrity.

1.3 using Arccatalog
Arccatalog is one of the most commonly used applications in ArcGIS for desktop. Similar to Windows Explorer, the left side of the Arccatalog interface is the directory tree and the content display area on the right. But the difference is that in arccatalog, all physical drive characters are not automatically added to the directory tree, and users need to manually connect to a folder.



Browse Data Information
The right side of the Arccatalog interface is the information browsing area, where you can browse the spatial information, attribute information, and metadata information of the data.



1. Preview spatial information or attribute information
In the left tree, navigate to the data you want to view, and adjust the right side to the preview tab to see the information. You can select the contents of the preview by using the Preview drop-down list below the interface.



If preview at the bottom of the interface is selected as geography, the spatial information of the data is previewed, and if the table is selected, the property information is previewed.

2. Browsing meta-data information
The so-called metadata (Metadata), which is the description of the basic properties of the data. ArcGIS uses the standard metadata format to record some basic information about spatial data, such as: the subject of the data, keywords, the purpose of mapping, mapping units, mapping time, completion or update status, coordinate systems, attribute fields, and so on. Metadata is a description of the data, through the meta-data, we can more easily share and communicate data.



Managing Spatial Data
Because most GIS data is made up of multiple files, all of its supporting files need to be uniformly modified to perform operations such as copying, pasting, deleting, or renaming. Arccatalog can identify all supporting files together and read them as a spatial data, so the spatial data can be easily managed in Arccatalog. Select the data you want to work with in the left-hand tree of Arccatalog and see these management options in the right-click menu.



Create spatial data (exercise)
1. Open Arccatalog, connect to the local disk where the exercise data is stored in the catalog tree, and locate the ... \data\using_arcmap folder, where the contents of the folder are displayed in the right area. Right-click in the right-hand area and select New > Shapefile from the pop-up menu.


2. In the popup dialog box, first fill in the feature class name "Building1" and then determine the geometry type of the feature class. Common geometry types include point (points), polyline (lines), and polygon (polygons), and this exercise is to create a polygon feature class.



3. Define the coordinate system. Click the Edit button. In the popup dialog box, locate the Add coordinate system select Import, which is the coordinate system that imports the existing feature class or raster data.


Then select Xiaoqu this raster in the popup dialog and click Add to finish.




4. Add a field to the newly created feature class. Right-click on the Building1 feature class and select Properties in the pop-up menu to open the Feature Class Properties dialog box. Select the Fields tab. Enter the field name, select the field type, and set the field properties (such as field length, field precision, and so on). In this exercise, you create 2 new fields, which are set up as follows:




When you finish setting up the fields, an empty feature class is created. As for how to add geographic feature data to a newly created feature class, it will be described in the next chapter.

1.4 Data Warehousing
Now, more and more organizations and individuals choose to use the Geodatabase format to organize their spatial data. Below we will learn how to import existing data into the Geodatabase spatial database. Sample data in ... \data\buildinggeodatabase, the contents of this folder are the topography and vegetation information of a protected area, as well as the scope of the protected area and the scope of the study.

The vegetation information is the data vegetion of coverage format, the terrain information is raster data dem30, the scope of the protected area and the research region are the data boundary.shp and STUDY_AREA.SHP in shapefiles format. Our practice is to create a geodatabase in this folder and convert all the data to the Geodatabase format.

Vector Data Warehousing
1. In Arccatalog navigate to ... \data\buildinggeodatabase, right-click Buildinggeodatabase > New > File geodatabase to create geodatabase.

The geodatabase is divided into three types: Personal geodatabase, File geodatabase, and ArcSDE geodatabase. Among them, Personal Geodatabase is based on Microsoft's access, the amount of data is limited (generally not more than 2GB); file Geodatabase is released in ArcGIS 9.2, which is based on the storage of files, with a maximum of 1TB of single file data The ArcSDE Geodatabase can store massive amounts of spatial data based on relational databases such as Oracle, SQL Server, DB2, and Informix.



2. Click the Red Toolbox on the toolbar to open Arctoolbox. Navigate to the Arctoolbox > Coversion tools > To Geodatabase > Feature class to Feature class tool and double-click to open the tool.



Common format conversion tools can be found in ArcToolbox > Conversion tools.





3. In the pop-up Feature class to Feature Class tool window, Input features entries are filled in ... \ buildinggeodatabase\vegetation\polygon;output Location entry fill in the Buildinggeodatabase\newfile geodatabase. Gdb;output featureclass entry into the vegetation. Click OK to start the inbound format conversion.



The above action is to convert polygon in coverage format vegetation to geodatabase formatted data, stored in the first step of the new Geodatabase, and the new feature class name is vegetation.

This tool not only transforms data in coverage format, but also transforms shapefiles or CAD data into geodatabase format.

4. Using the same method described above (Feature Class to Featureclass tool), will ... \data\buildinggeodatabase\boundary.shp and Study_ The area.shp is converted to the Geodatabase format and imported into the new File geodatabase.gdb.

Raster Data Warehousing
1. Navigate to the Arctoolbox >conversion tools >to geodatabase >raster to Geodatabase (multiple) tool and double-click to open it.



2. Input rasters entry ... \data\buildinggeodatabase\dem30; Output geodatabase Entry Enter ... \data\buildinggeodatabase\new File GEODATABASE.GDB, click OK to import the raster data dem30 into Geodatabase.



If there is more raster data that needs to be tiled into a single graph, then the data can be appended on the basis of the imported raster. The DEM30 right->load > Load Data for the 2nd step has been imported to start the geodatabase work of the raster map.



Practice data Download: Link: http://pan.baidu.com/s/1i4FuY9n Password: sk6y

Each chapter of this introductory tutorial connects:
Getting Started with ArcGIS for desktop tutorial-Chapter I-Introduction: http://zhihu.esrichina.com.cn/?/article/524
Getting Started with ArcGIS for desktop tutorial-chapter II _desktop Introduction: http://zhihu.esrichina.com.cn/?/article/525
Getting Started with ArcGIS for desktop tutorials-Chapter III _desktop Software Installation: http://zhihu.esrichina.com.cn/?/article/526
Getting Started with ArcGIS for Desktop Tutorial _ Chapter Fourth _ Getting Started case study: http://zhihu.esrichina.com.cn/?/article/527
Getting Started with ArcGIS for Desktop Tutorial _ Chapter fifth _arccatalog using: http://zhihu.esrichina.com.cn/?/article/528
Getting Started with ArcGIS for Desktop Tutorial _ Chapter Sixth _ making a map with ArcMap: http://zhihu.esrichina.com.cn/?/article/529
ArcGIS for desktop Getting Started Tutorial _ Chapter Seventh _ Using ArcGIS for spatial analysis: http://zhihu.esrichina.com.cn/?/article/530
ArcGIS for desktop Getting Started Tutorial _ Chapter Eighth _desktop Learning resources: http://zhihu.esrichina.com.cn/?/article/531

ArcGIS for desktop Getting Started tutorial _ fifth _arccatalog Use-ArcGIS know-Next generation ArcGIS Quiz community