Cross-reference mapping files

Mapping information for the Create Cross-Reference tool can also be provided in a separate file as an Excel spreadsheet. This file can be created for instances where the Create Cross-Reference tool will not be able to automatically match feature class and field names. It would be useful if, for example, source Road_L should be loaded into target RoadL, because the target does not contain Road_L.

The external mapping file you can create allows you to customize the way the source workspace is mapped to the target. When this file is used for mapping the source to the target workspace, the Create Cross-Reference tool does not attempt to map them to one another; it only uses the information provided in the mapping file. This also means that all tables and fields in the source workspace that need to be mapped to the target must be included. If they are not, they are omitted during the load process.

This mapping file can contain 1–3 worksheets, as follows:

Each worksheet's name corresponds to the name of a table in the cross-reference database, except that spaces are allowed in the worksheet names. Also, instead of numeric identifiers for tables in datasets and their fields, you can provide actual names.

NotaNota:

An empty cross-reference mapping file is included with Production Mapping. The Excel_Mapping_Template.xls file is installed at <Production Mapping install location>\ESRIProductionMapping\Desktop10.0\DataConversion.

Dataset Mapping worksheet

On the Dataset Mapping worksheet, you can list the tables in the source dataset and specify what tables they should be mapped to in the target dataset. For instance, you could indicate that the RoadL table in the source dataset should be mapped to the Road table in the target dataset. If there are conditions you want to apply to the source data as it is loaded into the target space, you can also add WHERE clauses and a code that corresponds to the subtype.

Example of a Dataset Mapping table
Example of a Dataset Mapping table

Columns that must be on the Dataset Mapping worksheet are described in the table below.

Column name

Description

Id

A unique identification number for each row

SourceDataset

Name of the table in the source dataset

TargetDataset

Name of the destination table in the target dataset

WhereClause

Contains an optional WHERE clause that determines which records are imported from the source

Subtype

A number that corresponds to a subtype in the target feature class into which the records are going to be imported

Dataset Mapping worksheet fields

Field Mapping worksheet

On the Field Mapping worksheet, you can specify which fields in the source tables should be mapped to the target tables. This can be configured when the name of the field in the source does not match the target. For instance, the name of the length field could be "len_" in the source and "len" in the target. There could also be more obvious differences in field names, such as the name field is "NAM" in one workspace and "NAM1" in the other workspace. On this table, you need to provide an ID number for the table in the dataset, which can be found in the Id column on the Dataset Mapping table.

Example of a Field Mapping table
Example of a Field Mapping table

Columns that must be on the Field Mapping worksheet are described in the table below.

Column name

Description

Id

A unique identification number for each row

DatasetMappingId

An identification number that contains the identifier of the dataset from the Dataset Mapping worksheet, Id column

SourceField

The name of the field in the source table

TargetField

The name of the destination field in the target table, which can be different from the source table

Field Mapping table columns

Update Values worksheet

With the Update Values worksheet, you can override values contained in a source field that would not be considered valid in the target field. For instance, you can replace all occurrences of the value "OPR" with "Operational". The FieldMappingId value corresponds to the Id column on the Field Mapping table.

Example of an Update Values table
Example of an Update Values table

Columns that must be on the Update Values worksheet are described in the table below.

Column name

Description

Id

A unique identification number for each row

FieldMappingId

An identification number that contains the identifier of the field from the Field Mapping worksheet, Id column

FromValue

The value contained in the source field that you want to overwrite

ToValue

The value that you want to use to replace the FromValue

Update Values worksheet columns

Temas relacionados


9/22/2010