How to Use MultiNet GDF
Parent topic: How to Use MultiNet GDF

Linking from MultiNet® GDF to MultiNet Shapefile

Linking these two product formats can be useful:

These components are handled differently in GDF and Shapefile, and there are also differences between European and U.S. and Canada data formats.

European Dataset IDs

In Europe, the technical datasets are based on Administrative Areas. The term "sections" is used to define one or more Administrative Areas. A country can have many datasets or sections (e.g., Germany has 15 datasets [D51, D52, D53...]) or just a single dataset can cover an entire country (e.g., San Marino has one dataset [SMR]).

Shapefile

In Shapefile format, the country ID and the feature ID are identified in a single ID field. The leading dataset identifier is always "1".

Example: Feature ID 32111001 in any dataset in Germany (276) is identified in the Shapefile ID and appears as:

12760032111001 (leading zeroes not shown for internal dataset identifiers).

GDF

In GDF-AS and GDF-AR formats:
  • the country dataset is identified in record 0201 (Dataset ID subrecord).
  • the section dataset is identified in record 1601 (Section Identification subrecord).
  • the feature ID for a line is identified in record 52 (Line feature record).
Example:
The same line ID identified in the Shapefile example above, 12760032111001, would be found in the following GDF-AS records:

Linking Between GDF and Shapefile

GDF Data Set Identifier + GDF Feature Identifier = Shape/OSL Feature Identifier
U.S. OR CANADA EXAMPLE DATASET ID SECTION ID / FEATURE ID
GDF-AS or GDF-AS 276 4567891230
Shapefile or OSL n/a 12764567891230

U.S. OR CANADA EXAMPLE DATASET ID SECTION ID / FEATURE ID
GDF-AS or GDF-AS 25840 4567891230
Shapefile or OSL n/a 258404567891230

Datasets of United States and Canada

In the U.S. and Canada datasets, the country code and dataset code are combined into a fivedigit code (leading zero not shown if dataset code (State FIPS or Province code) is less than "10"). The country codes are based on the ISO designation.

Shapefile

In U.S. and Canada Shapefile format:
  • the first two digits of the five-digit dataset code is the state's FIPS code (U.S.) or a Province code (Canada);
  • the next three digits of the five-digit dataset code identify a country.
Example:

Feature ID 300919304 in dataset Connecticut (09), in the U.S. (840) is identified in the ID in the Shapefile "ID" field and appears as: 98400300919304 (leading zeroes not shown for internal dataset identifiers).

GDF

In GDF-AS format:
  • the country dataset is identified in record 0201 (Dataset ID subrecord).
  • the dataset is identified in record 0201 (Dataset ID subrecord).
  • the feature ID for a line is identified in record 52 (Line feature record).
Example:
The same line ID identified in the Shapefile example above, 98400300919304, would be found in the following GDF-AS records:
Parent topic: How to Use MultiNet GDF