Create Attribute Table Arcgis
A few of them are covered below. Typically, polygon feature classes in ArcGIS already have a length and area field defined. The ArcGIS 9. This exercise of the Building a geodatabase tutorial shows you how to create a coded value attribute domain, create subtypes, and associate default values and attribute domains to subtypes. The attribute table opens to show all the records for the layer. 2, you MUST c reate the database within Arc Catalog by right-clicking in the table of contents, clicking new , and new personal geodatabase. com Map Layers. Table of Contents. Consider, for instance, an application that uses the Find task to allow users to search for counties. Choose the option to join based on attributes. I'm using python scripts on ArcGIS 10. If you have an existing table and you do not check Overwrite, the table will be updated. Owners and administrators of a layer manage how others can edit the layer and its attributes. For this exercise, an. Drawing lines, points or polygons (vectors) in QGIS. It requires a geodatabase, then create a new (if not count) Feature Class. , normal distribution), outliers, skewness, etc. Creating an Empty Shapefile 1. Creating a map of SCS CN by using land use, soil and CN lookup table Input Data. It provides access to the mathematical functions defined by the C standard. x One very useful function of ArcGIS is the creation of hyperlinks. Local subnetwork domains: On a local area network (LAN), a domain is a subnetwork made up of a group of clients and servers under the control of one central security database. The Table window also has a toolbar and several menus that allow you to interact with the attributes of the table and, in the case of spatial data, the map. The one-meter DEM is the highest resolution standard DEM offered in the 3DEP product suite. To sort on the geometry field or multiple fields, you need ArcGIS Desktop Advanced. ACL is now Galvanize We’ve taken a giant step toward uniting security, risk management, compliance, and audit professionals to strengthen and protect organizations. It now contains fields Point_X and Point_Y in Decimal Degrees on WGS1984. Prior to jQuery 1. Use one of the following. Additional data can be added to an attribute table to make the information more useful in ArcGIS. 1 are two modules in ArcGIS Desktop. This action adds the buildings layer with fictitious heights which were assigned in the attribute table. Four fields in the DynamicValue table (Value Method, Table Name, Field Name, and Value Info) must be configured to use an Attribute Assistant method. Meta is a prefix that in most information technology usages means "an underlying definition or description. Right-Click on the original tgr09009blk00 Layer and Select Remove from the Context Menu. The Federal Geographic Data Committee (FGDC) created the Content Standard for Digital Geospatial Metadata (CSDGM) that has been used in the United States for many years; it is commonly referred to as the FGDC metadata. Town of Westwood. Hawths Analysis Tools for ArcGIS Hawth's Analysis Tools for ArcGIS. NOTE – if you are using ArcGIS 9. Right-Click on the Area_of_Interest_polygon_polygon Layer and select Zoom to Layer. You also learned how to modify the attribute table and add your own attributes, and then how to change and populate those values in one of the ways ArcGIS makes available to you. Welcome to Getting Started with ArcGIS. The Value Method field in the DynamicValue table defines the actions that occur when the Attribute Assistant is enabled and features are modified or created in ArcMap. Click the field or fields. Select by. Open ArcGIS 2. The following steps describe how to edit a feature layer in Map Viewer. In ArcGIS, a table has a series of rows and columns used to store descriptive information. Also, if you have a list lat/long coordinates, you can easily import this data in your GIS project. Summary The basis steps to assign attributes to a feature include getting the table with the feature, finding the feature in question, and changing the specific value. Create a new Feature Class in your File Geodatabase, containing the fields for each of the attributes that you would like users to collect information for. jpg) into ESRI's ArcMap software, and then to assign real-world coordinates to the image. Open the attribute table, add a field and use Field Calculator to get your old pixel values back - by calculating "Your Value= 1 / 1*X". Thus, you cannot use a text field in a vector attribute table for the cell assignment in converting vector data to raster data. For each shapefile there exist at least 3 files, the shape data (stored in the. If you have a table of x,y coordinates, such as GPS measurements, you can add it to ArcMap to create a new point layer (known as an x,y event layer). In ArcGIS 9. Choose the option to join based on attributes. This will create a field called pkuid in the attribute table and assign a unique numeric id automatically to each feature. This is the fastest. Export to dBase or Text. Show method is used in the Form1_Load event handler. In ArcMap, we add fields in the Attribute Table. 2, you MUST c reate the database within Arc Catalog by right-clicking in the table of contents, clicking new , and new personal geodatabase. This will add the selected set of railroads to the map as a layer, i. Check the Unique check box if your field values are unique. to a Shapefile Attribute Table in ArcGIS By Monica Pratt, ArcUser Editor Attributes, which describe qualities associated with features, are stored in tables. No fields will be deleted, but the values in the table will be up to date. length property and a value on the. Adds an attribute index to an existing table, feature class, shapefile, coverage, or attributed relationship class. •Publish the Gridded Reference Graphic to ArcGIS Enterprise/Portal for ArcGIS for. Raster grids in ArcGIS need to use integer or floating-point values for the "Value" attribute in the raster attribute table. Uncheck boxes to hide them. An iterator is any object that, pointing to some element in a range of elements (such as an array or a container), has the ability to iterate through the elements of that range using a set of operators (with at least the increment (++) and dereference (*) operators). Creating tables. This is the fastest. If you have a table of x,y coordinates, such as GPS measurements, you can add it to ArcMap to create a new point layer (known as an x,y event layer). ArcGIS - provides a rich set of tools for viewing and displaying attribute data. To enter attributes for new features, on the active template, click the forward. A useful. Such a join will add all the columns of your tabular data to the attributes of the geographic layer (shapefile, etc. In ArcMap, you can add a field through the attribute table of a layer or through the Catalog window by accessing the same Properties dialog box and Fields tab. The feature layer item page provides a powerful set of tools for viewing and managing your data. It provides access to the mathematical functions defined by the C standard. In raster datasets, each row of an attribute table corresponds to a certain zone of cells having the same value. Tujuan Tujuan penulisan Laporan ini adalah untuk memenuhi tugas laporan Praktikum sistem informasi geografi. Attribute domains are a property of the geodatabase and can be shared across feature classes, tables, and subtypes in a geodatabase. Hence, we need to create the “unique” -function ourselves. Table of Contents. Additional data can be added to an attribute table to make the information more useful in ArcGIS. If you need to create a new “clipper” GIS file (e. Create a group on ArcGIS Online. Four fields in the DynamicValue table (Value Method, Table Name, Field Name, and Value Info) must be configured to use an Attribute Assistant method. Choose the option to join based on attributes. The ordering of the enumerable properties in the array is consistent with the ordering exposed by a forin loop (or by Object. It is possible to scan a paper map and import the resulting image into a GIS. On This Page Intro to Symbolization in ArcGIS Download Geographic Data About Louisiana Explore the Attribute Table of the Cities Layer Adjust the Color, Size, and Type of Symbol Used to Represent Features on the. Now if you open the attribute table of the generated points you will see all the fields from the original attribute table have been added. Click Add. Click Create Layer. Click the field or fields. getOwnPropertyNames() returns an array whose elements are strings corresponding to the enumerable and non-enumerable properties found directly upon obj. Right-Click on the original tgr09009blk00 Layer and Select Remove from the Context Menu. While there are certainly other ways to do this either in ArcGIS (Desktop or Pro) or through SQL we’ll focus specifically on the needs of Python programmers working with Arcpy who need to generate a list of unique values for an attribute field. Show method is used in the Form1_Load event handler. Note: Before the release of Office 2007, Microsoft Excel was limited to 65,536 rows. Fields —This view of the table is more useful for layer owners or portal administrators who need to see or manipulate the schema of the attribute table. Export to other software (MS Excel, SPSS, etc. Check the Create an autoincrementing primary key box. Through the Clearinghouse you can find datasets related to forests and grasslands, including boundaries and ownership, natural resources, roads and trails, as well as datasets related to State and private forested areas, including insect and disease threat and surface water. Next, you'll create a definition query to identify those stands that will be harvested on public lands. These functions cannot be used with complex numbers; use the functions of the same name from the cmath module if you require support for complex numbers. Note that this is a temporary join. Creating tables. Creating spatial data from tables. You also learned how to modify the attribute table and add your own attributes, and then how to change and populate those values in one of the ways ArcGIS makes available to you. If you need to create a new “clipper” GIS file (e. This means you do not need to create a new MessageBox() anywhere in your code. Only features with attributes that satisfy the filter expression will be drawn. They can also be a way to share more detailed GIS information with people in the field. dbf file), and a spatial index (stored in the. I have a polyline shapefile of the stream in ArcGIS. Data attribute type and field properties, such as precision, scale, or length, must be specified when creating fields for the attribute table of a new shapefile. Here are the steps for calculating the area of a polygon using ArcGIS. Create points from a line (ArcGIS) I need two text files, one with the x coordinates and another with the y coordinates of a stream (to put into matlab). Attribute information can be provided automatically as part of a returned FeatureSet from a QueryTask operation of an ArcGIS Server map service (see the code example in this document). 0 attribute-table editing or ask your own question. Read Permission of a file. Creating a map of SCS CN by using land use, soil and CN lookup table Input Data. 3 desktop suite consists of five programs that. Polygons must be defined in the same attribute table to be displayed in the same map layer. Attributes Property makes use of IDictionary(OF String, Object) which is a type of KeyValuePair. The instructions provided describe how to concatenate attributes from two or more fields in a table using ArcMap. If you sell products and enter them into a table with columns for ProductName, Price, and ProductID, each of those headings is an attribute. Inside either application you can also use the Add Field geoprocessing tool. Note: Before the release of Office 2007, Microsoft Excel was limited to 65,536 rows. •Create grids with either a starting point or area, based on either dimension or a reference system (MGRS and USNG). container for GIS data” and is specific to ArcGIS. An iterator is any object that, pointing to some element in a range of elements (such as an array or a container), has the ability to iterate through the elements of that range using a set of operators (with at least the increment (++) and dereference (*) operators). The Value Method field in the DynamicValue table defines the actions that occur when the Attribute Assistant is enabled and features are modified or created in ArcMap. Hawths Analysis Tools for ArcGIS Hawth's Analysis Tools for ArcGIS. A selection is required to perform the edits, and you work from within the map or scene, instead of the open table. A new raster attribute table will be created, and the old one will be deleted. Only those polygons that meet the criteria of the definition query have been updated. Creating Relative Hyperlinks in ArcGIS 9. 6 it also traverses objects. Attribute information can be provided automatically as part of a returned FeatureSet from a QueryTask operation of an ArcGIS Server map service (see the code example in this document). These seamless DEMs were referred to as the National Elevation Dataset (NED) from about 2000 through 2015 at which time they became the seamless DEM layers. The Mapping Platform for Your Organization. If you have an existing table and you do not check Overwrite, the table will be updated. To create a feature layer that contains related records, you must publish the layer from ArcGIS Pro or ArcMap. In ArcMap, we add fields in the Attribute Table. There are three basic attributes for plain file permissions: read, write, and execute. How can I change the data type in an attribute table in ArcGIS for multiple fields? For example, if the fields have been exported as a string from Excel, and I would like to use them as numerical. For each feature within the shapefile, there is an associated record within the attribute table. Input options: Any georeferenced image file or WMS layer containing features you would like to trace. To hide or show attribute fields, click the Show/Hide Column button in the upper right corner of the table. Attribute Table Definition. In the Layer Item page, take a moment to explore the properties of the new dataset. x One very useful function of ArcGIS is the creation of hyperlinks. Desktop Help 10. When more than one layer's attributes display, multiple tabs automatically generate in the attribute panel allowing you to switch among the attribute tables. To enter attributes for new features, on the active template, click the forward. 1 and shows you how to create a simple map using urban and state data sources. A selection is required to perform the edits, and you work from within the map or scene, instead of the open table. Table for the QueryDescription the attribute table has // Create a new. In ArcGIS Pro, you can view and manage the fields of a layer or table in the fields view. Unzip the contents of the file to the initials folder. When the tool finishes open the attribute table for the projected Layer (MySurvey_DD). Use one of the following. SpatialEcology. When you define a list of values, you set a code—the value stored in ArcGIS Online —and a label—the value users see in the values list and attribute table when they view it in ArcGIS Online. Creating a new boundary feature to act as the clipper layer. com Map Layers. Open the Attribute Table for a data layer (right-click on the layer in the Table of Content s and choose Open Attribute Table) Click on the Options button and choose Add Field Enter a Name for. This module is always available. Four fields in the DynamicValue table (Value Method, Table Name, Field Name, and Value Info) must be configured to use an Attribute Assistant method. How to edit attribute tables using Python/ArcPy? Ask Question Browse other questions tagged arcpy arcgis-10. Create or update a table with information about the classes in your raster datasets. It now contains fields Point_X and Point_Y in Decimal Degrees on WGS1984. Layers and table views provide useful reference shortcuts to feature or tabular data on disk, but more important benefits are realized when they're used in conjunction with selection tools: Select Layer By Attribute and Select Layer By Location. The TimberHarvest field in the attribute table updates. Tables 2 and 3 are Microsoft Excel spreadsheets in the. A delimited text file is an attribute table with each column separated by a defined character and each row separated by a line break. On either the Map or Edit tab, in the Selection group, click Attributes. I know how to create a table, add rows, add fields and send. When creating a GIS layer, you must decide on the attributes that each feature will have. A database attribute is a column name and the content of the fields under it in a table in a database. Usage Shapefiles and file geodatabase do not support multiple indexes, so additional fields will become part of a composite index (that is, an index created on multiple fields in a table). The dBASE table file contains feature attributes with one record per feature. This is used primarily with discrete data. Explore the various attributes and their values. An HSL color value is specified with the hsl() function, which has the following syntax: hsl(hue, saturation, lightness) Hue is a degree on the color wheel (from 0 to 360) - 0 (or 360) is red, 120 is green, 240 is blue. To make the join permanent, you need to create a new shapefile (right click on the layer in the table of contents, select "Data", then "Export Data"). PDF maps & atlases from ArcGIS How to create PDF maps, pdf layer maps and pdf maps with attributes. You can make these associations in several ways, including by joining or relating tables temporarily in your map or by creating relationship classes in your geodatabase that maintain more permanent associations. If you are new to GIS, this book is a great place to startŠyou. Learn more about ArcGIS field data types. Add Excel table that want to join to Attributable, you need to add category for device in Excel before you will join it to Attributable 4. Choose the option to join based on attributes. Click the field or fields. More than one template can be created for the same table and configured with different attribute values. Okay, that's it for this lesson. makeArray() for such conversions. In the Create Features pane, on the active template, the forward arrow opens the template in the pane and displays the feature attribute table. 1 Joining and relating tables Consider the three tables shown in the top half of figure 1. Type the name for the new index. You can edit tabulated results of an attribute query set using the Return Attribute Set option with the tools shown in the following table. Four fields in the DynamicValue table (Value Method, Table Name, Field Name, and Value Info) must be configured to use an Attribute Assistant method. Doing so was my preference in ArcGIS for Desktop, and it would be nice to be able to do the same in Pro. Courtesy: help. Click the Buffer Wizard icon to start the tool. Open the attribute table by right clicking on the layer. Another way to update existing feature attributes is to use the Attributes pane. Attribute domains are a property of the geodatabase and can be shared across feature classes, tables, and subtypes in a geodatabase. This allows the inspection of the data for its underlying distribution (e. An iterator is any object that, pointing to some element in a range of elements (such as an array or a container), has the ability to iterate through the elements of that range using a set of operators (with at least the increment (++) and dereference (*) operators). For information on attribute indexes in geodatabases, see Creating attribute indexes. If your table contains the IDs of both points as well as a concatenated ID field, you can join the data together at the end. Adding Data to an Attribute Table Attribute tables hold a collection of data specific to locations on the Earth’s surface. The others continue to have a value of for the TimberHarvest field. A new raster attribute table will be created, and the old one will be deleted. GIS packages have some way of creating and editing these data tables. Desktop Help 10. A common type of delimited text file is a CSV (Comma Separated Values), with each column separated by a comma. Transfer Files. Right-Click on the Area_of_Interest_polygon_polygon Layer and select Zoom to Layer. When you add an OLE DB connection manager to a package, Integration Services creates a connection manager that resolves to an OLE DB connection at runtime, sets the connection manager properties, and adds the connection manager to the Connections collection on the package. When you view the table from the Fields page, you see a list of all the fields in the attribute table, including hidden fields, and fields from any related tables. Meta is a prefix that in most information technology usages means "an underlying definition or description. Use one of the following. No fields will be deleted, but the values in the table will be up to date. Once you have done this, you should see additional data (scrolling down) for “ArcGIS Metadata” and “FGDC Metadata”. 1 are two modules in ArcGIS Desktop. 0 - Exercise 3: Creating subtypes and attribute domains. I know how to create a table, add rows, add fields and send. More than one template can be created for the same table and configured with different attribute values. Description. ArcGIS is a program that allows you to create maps by combining data with a shapefile. I want to Merge all the shapefiles into one, but I need to keep the shapefile name. PDF maps are a very handy way to share your information with the public as well as co-workers. I have added a field to each of these shapefiles, but can't figure out how to populate the table with the name of the shapefile. Each row has a series of fields with values. The Graphic. Export to other software (MS Excel, SPSS, etc. To turn off this color mapping, provide "rasterFunction":"None". Export to dBase or Text. Show method is a static method. In ArcMap, we add fields in the Attribute Table. To turn off this color mapping, provide "rasterFunction":"None". If your table contains the IDs of both points as well as a concatenated ID field, you can join the data together at the end. With ArcGIS Desktop Basic and Desktop Standard, you will only be allowed to sort on one attribute field. When you add, delete, or edit a feature or attribute and realize you made a mistake, you can click Undo to delete your edit. This will create a field called pkuid in the attribute table and assign a unique numeric id automatically to each feature. Unzip the contents of the file to the initials folder. Four fields in the DynamicValue table (Value Method, Table Name, Field Name, and Value Info) must be configured to use an Attribute Assistant method. On the ribbon, on the Table contextual tab, click the View tab. Through the Clearinghouse you can find datasets related to forests and grasslands, including boundaries and ownership, natural resources, roads and trails, as well as datasets related to State and private forested areas, including insect and disease threat and surface water. In the Layer Item page, take a moment to explore the properties of the new dataset. Output options: A shapefile or KML file with vector features. The only important difference is that only tables from dBASE or INFO sources can be edited within ArcGIS, whereas text and ODBC tables cannot be edited in ArcGIS. Use one of the following. Histograms What is a histogram? A histogram is a plot that lets you discover, and show, the underlying frequency distribution (shape) of a set of continuous data. The Value Method field in the DynamicValue table defines the actions that occur when the Attribute Assistant is enabled and features are modified or created in ArcMap. 3 Installing Connector/Python from a Source Distribution. Only those polygons that meet the criteria of the definition query have been updated. Open the Attribute Table for a data layer (right-click on the layer in the Table of Content s and choose Open Attribute Table) Click on the Options button and choose Add Field Enter a Name for. Export to other software (MS Excel, SPSS, etc. Owners and administrators of a layer manage how others can edit the layer and its attributes. Consider, for instance, an application that uses the Find task to allow users to search for counties. Realize new opportunities and gain insight. If the resultant table happens to be a layer attribute table, then ArcGIS gives you the luxury of displaying or analyzing joined data as though it were an integral part of your attribute table. Also, you don’t have the flexibility with raster data attribute tables. Creating Relative Hyperlinks in ArcGIS 9. The term domain can refer either to a local subnetwork or to descriptors for sites on the internet (such as www. Tujuan Tujuan penulisan Laporan ini adalah untuk memenuhi tugas laporan Praktikum sistem informasi geografi. Table for the QueryDescription the attribute table has // Create a new. 0 - Exercise 3: Creating subtypes and attribute domains. Creating Symbols. A new and updated version is available at Importing Spreadsheets or CSV files (QGIS3) Many times the GIS data comes in a table or an Excel spreadsheet. Courtesy: help. For many features, one attribute is dependent on another attribute of the same feature. If you have privileges to edit the layer, you can edit or delete the attributes in the layer's attribute table and in any related tables. To enter attributes for new features, on the active template, click the forward. 1 and shows you how to create a simple map using urban and state data sources. Four fields in the DynamicValue table (Value Method, Table Name, Field Name, and Value Info) must be configured to use an Attribute Assistant method. The attribute table that is attached to our feature class stores additional information about each item on the map. These seamless DEMs were referred to as the National Elevation Dataset (NED) from about 2000 through 2015 at which time they became the seamless DEM layers. Saturation is a percentage value; 0% means a shade of gray and 100% is the full color. Type the name of the field. Each GeoPlanner template must have its own group. If a polygon – or set of polygons – is defined in a separate attribute table then it is displayed on a different map layer. ArcGIS 10. In many applications, the same Symbol will be used many times. For example, if you have a table or text file containing spatial positions and attributes, you can create a layer or new feature class from the data in the table. Editing attributes of vector features in ArcGIS using field calculator 3. Export to other software (MS Excel, SPSS, etc. data point: A data point is a discrete unit of information. In a general sense, any single fact is a data point. This allows the inspection of the data for its underlying distribution (e. Now that you have a non-float raster (and ArcMap surely loves these) create an attribute table: ArcToolbox > Data Management Tools > Raster > Raster Properties > Build Raster Attribute Table. mdb) or a full relational database (SQL Server, Oracle, Informix or DB2). Export to dBase or Text. Fields —This view of the table is more useful for layer owners or portal administrators who need to see or manipulate the schema of the attribute table. Share the feature layers as a feature service in ArcGIS Online. Create one or more feature classes and add them as feature layers to ArcGIS Desktop or ArcGIS Pro. Recently I was creating a HUGE figure which needed to reference all the features in the map with a number, so, as I would normally, I went to the attribute table, created a new field and opened up the ArcGIS Field Calculator, then opened up Ian Ko's Easy Calculate (EC50 to you REAL GIS nerds)…. Specify your buffer distance (10) and verify the units are correct (meters). You can also add more fields through ArcCatalog (right click on the shapefile name and choose properties), but we will do it in ArcMap only. In ArcGIS, a table has a series of rows and columns used to store descriptive information. This topic describes these steps and the associated role of the editor to complete an efficient and safe edit operation within the table. There are three basic attributes for plain file permissions: read, write, and execute. Creating a map of SCS CN by using land use, soil and CN lookup table Input Data. 6 it also traverses objects. Dengan adanya laporan ini diharapkan dapat bermanfaat dan menjadi panduan dalam pembuatan attribute table di ARCGIS 10. Ecology based spatial analysis tools and techniques, and articles pertaining to writing customised spatial analyses in ESRI's ArcObjects. Share the feature layers as a feature service in ArcGIS Online. However, there are various workarounds available to create DataFrame objects from shapefiles attribute tables. container for GIS data” and is specific to ArcGIS. BNote: Within ArcCatalog. Show method is used in the Form1_Load event handler. Each raster cell is assigned a density value and the entire layer is visualized using a gradient. How To: Create sequential numbers in a field using Python in the Field Calculator Summary. Additional data can be added to an attribute table to make the information more useful in ArcGIS. jpg) into ESRI's ArcMap software, and then to assign real-world coordinates to the image. I'm using python scripts on ArcGIS 10. PDF maps & atlases from ArcGIS How to create PDF maps, pdf layer maps and pdf maps with attributes. The match attribute can also be used to define a template for the entire XML document. They can also be a way to share more detailed GIS information with people in the field. Prior to jQuery 1. This will add the selected set of railroads to the map as a layer, i. Normalization is a useful process in mathematics as it allows you to scale down large sets of data in order to be able to compare them to different sets of data. In ArcGIS, a table has a series of rows and columns used to store descriptive information. This will add the selected set of railroads to the map as a layer, i. Right-Click on the AOI_Census_Blocks_SF1 Layer and Open the Attribute Table. Make a new shapefile/feature class and add the number of records you need (copy and paste groups until you have the right amount for large numbers) and use the field calculator to copy this over to a new field if you need that, but the OID field should be fine. This tutorial takes you through the steps necessary to import an image in JPEG format (*. X: Create a table that contains these fields (at the very least): Unique ID: This might be a concatenated field based on the IDs of your two points. It provides access to the mathematical functions defined by the C standard. Attribute indexes are used by ArcGIS to quickly locate records that match an attribute query. You can make these associations in several ways, including by joining or relating tables temporarily in your map or by creating relationship classes in your geodatabase that maintain more permanent associations. Add an area or perimeter field to a shapefile or feature class in ArcGIS Desktop. This can be simple field validation similar to a geodatabase domain or with more complex attribute dependencies. In ArcMap, you can select features by searching with a Structured Query Language (SQL) expression. The Mapping Platform for Your Organization. Note: The code in this article generates sequential numbers for unsorted data based on the OID or FID order. Raster datasets can become potentially very large because they record values for each cell in an image. To follow the instructions below, you can download the MTBS wildfire data (national datasets) and store them on your pc. While there are certainly other ways to do this either in ArcGIS (Desktop or Pro) or through SQL we’ll focus specifically on the needs of Python programmers working with Arcpy who need to generate a list of unique values for an attribute field. Now right click on trains in the table of contents and then click on Selection then Create Layer From Selected Features. Click the field or fields. relationship class defining the relationship between the land use attribute table and the land use description lookup table.