Vector files - guidelines and restrictions

Vector file which can be imported into and displayed by Touchstone Re.

Before importing vector files, consider the following guidelines and restrictions.

Each vector feature has attribute data that describes it. For supported geometry types for each format, see the Help topic for that format.

Projections

Verisk has certified various projections as described in the Projections topic.

File size

The following table summarizes file size restrictions:

Format Name

Maximum File Size

ESRI Shapefile

2 GB for each component

GML

No constraints. 1 GB for a 32-bit platform.

GeoJSON

No constraints

SQLite

No constraints

File naming conventions

  • The file name must begin with an alphanumeric character and can contain only alphanumeric characters, underscores, and spaces. For example, Mall_T=0.06 is incorrect, while Malla_T_006 is correct.

  • The file should not use SQL reserved words as field names. For example, the field names should not contain: merge, load, add, etc. The full list of SQL reserved words can be found athttp://technet.microsoft.com/en-us/library/ms189822.aspx.

Geometry

  • Touchstone Re does not support layers with mixed geometry types; for example, points, lines, and polygons in the same file. Make sure that the vector files that you are importing are compatible with the layer type; otherwise, the application can produce an error about incompatible geometry types when you run the analysis.

  • Touchstone Re supports the import of files with Z and M attributes, but does not use them in processing or visualization.

  • Touchstone Re can import a spatial data file that contains objects with NULL geometry, but does not use those objects.