Use SearchCursor to return attributes using tokens. SHAPE@TRUECENTROID —Ein Tupel von XY-Koordinaten für den tatsächlichen Feature-Schwerpunkt. The order of fields will be returned in the order they were specified when creating the cursor. Discussion. SHAPE@AREA —Duplikat der Fläche des Features. The SearchCursor function establishes a read-only cursor on a feature class or table. An SQL postfix clause is positioned in the second position and will be appended to the SELECT statement, following Additional information can be accessed using tokens (such as OID@) in place of field names: SHAPE@JSON, SHAPE@WKB, and SHAPE@WKT tokens were made available at ArcGIS 10.1 Service Pack 1. Use SearchCursor to return a set of unique field values. The feature class, layer, table, or table view. The feature class, layer, table, or table view. 7 Auflösen bestimmter Polygone in SearchCursor mit Python in Arcmap; 5 Wählen Sie mit arcpy.da.UpdateCursor zufällig einen zu aktualisierenden Datensatz aus; 2 Wie verwende ich den SearchCursor where_clause, um einen Maximalwert aus einer Spalte zu erhalten? Returns the next row as a tuple. Accessing full geometry with SHAPE@ is an expensive operation. If only simple geometry information is required, such as the x,y coordinate of a point, use tokens such as SHAPE@XY, SHAPE@Z, and SHAPE@M for faster, more efficient access. Alternatively, sort using sql_clause if the data supports SQL ORDER BY. ArcPy function to create a read-only cursor. the where clause. Geometry properties can be accessed by specifying the token SHAPE@ in the list of fields. The feature class, shapefile, or table containing the rows to be searched. DISTINCT, ORDER BY, and ALL are only supported when working with A tuple of field names used by the cursor. String: field_names [field_names,...] A list (or tuple) of field names. An optional expression that limits the rows returned in the cursor. Alternatively, sort using sql_clause if the data supports SQL ORDER BY. Deconstruct a feature into its individual points or vertices. SHAPE@X —A double of the feature's x-coordinate. import arcpy fc = 'c:/base/data.gdb/roads' class_field = 'Road Class' name_field = 'Name' # Create an expression with proper delimiters expression = u'{} = 2' . The SQL postfix clause is most commonly used for clauses such as ORDER BY. An SQL prefix clause is positioned in the first position and will be inserted between the SELECT keyword and the SELECT COLUMN LIST. The SQL prefix clause is most commonly used for clauses such as DISTINCT or ALL. The feature class, layer, table, or table view. Debate. Debate. However, for faster performance and reliable field order, it is recommended that the list of fields be narrowed to only those that are actually needed. The feature class, shapefile, or table containing the rows to be searched. String: where_clause. Use an asterisk (*) instead of a list of fields if you want to access all fields from the input table (raster and BLOB fields are excluded). arcpy.da.SearchCursor should not to be confused with the arcpy.SearchCursor. Use SQL TOP to limit the number of records to return. String: where_clause. Summary. Es bietet eine übertragbare Darstellung eines Geometriewertes in Form eines zusammenhängenden Datenstroms. Use SearchCursor with a where clause to identify features that meet specific criteria. Es bietet eine übertragbare Darstellung eines Geometriewertes in Form einer Textzeichenfolge. The SearchCursor function establishes a read-only cursor on a feature class or table. TOP is only supported by SQL Server and MS Access databases. format ( arcpy . SHAPE@LENGTH —A double of the feature's length. SHAPE@XY —A tuple of the feature's centroid x,y coordinates. Search cursors can be iterated using a For loop. An optional pair of SQL prefix and postfix clauses organized in a list or tuple. The search can optionally be limited by a where clause or by field, and optionally sorted. The tuple will include all fields (and tokens) specified by the field_names argument. SQL postfix supports None, ORDER BY, and GROUP BY. The SearchCursor function establishes a read-only cursor on a feature class or table. The search can optionally be limited by a where clause or by field and optionally sorted. For more information on WHERE clauses and SQL statements, see About_building_an_SQL_expression. If the field_names argument is set to "*", the fields property will include all fields used by the cursor. Syntaxe. SHAPE@M —Duplikat des M-Wertes des Features. The search can optionally be limited by a where clause or by field and optionally sorted. Use SearchCursor with a where clause to identify features that meet specific criteria. 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The fields property will include ALL fields ( and tokens ) specified by field_names. Search cursors can be constrained to match attribute criteria or spatial criteria as DISTINCT or ALL,!

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