Features read from an MVT file consist of geometry and a series of attribute values. The attribute names are as defined in the workspace.
Features being returned may include additional attributes that do not appear on the reader schema if the tiles scanned for schema do not account for all attributes.
MVT string attribute values are stored in UTF-8 encoding.
In addition to the generic FME feature attributes that FME Workbench adds to all features (see About Feature Type Attributes), this format also adds format-specific attributes (Format Attributes).
| Attribute Name | Contents |
|---|---|
|
mvt_id |
Unique identifier for each feature. |
|
mvt_tile_column |
An integer value indicating the tile number in the X direction, according to the tiling scheme, for the tile containing the current feature. Note This is only generated when reading a zoom level or tileset and not a single MVT tile file.
|
|
mvt_tile_row |
An integer value indicating the tile number in the Y direction, according to the tiling scheme, for the tile containing the current feature. Note This is only generated when reading a zoom level or tileset and not a single MVT tile file.
|
|
mvt_type |
The format geometry type for the feature. See Geometry. |
|
mvt_zoom_level |
An integer value between 0 and 22 that indicates the zoom level for the tile containing the current feature. Note This is only generated when reading a zoom level or tileset and not a single MVT tile file.
|
Attribute Type Mapping
|
Attribute Type |
FME Attribute Type |
|---|---|
|
bool |
fme_boolean |
|
double |
fme_decimal(width, precision) |
|
double |
fme_real32 |
|
double |
fme_real64 |
|
int64 |
fme_int8 |
|
int64 |
fme_uint8 |
|
int64 |
fme_int16 |
|
int64 |
fme_uint16 |
|
int64 |
fme_int32 |
|
int64 |
fme_uint32 |
|
int64 |
fme_uint8 |
|
int64 |
fme_int64 |
|
int64 |
fme_uint64 |
|
string |
fme_json |
|
string |
fme_char(width) |
|
string |
fme_buffer |
|
string |
fme_time |
|
string |
fme_date |
|
string |
fme_datetime |
|
string |
fme_varbinary(width) |
|
string |
fme_binary(width) |
|
string |
fme_binarybuffer |
|
string |
fme_xml |
|
string |
fme_varchar(width) |
Geometry
The geometry of MVT features may be identified by the mvt_type attribute and correspond to 2D vector geometries. The valid values for this attribute are:
| mvt_type |
Description |
|---|---|
|
wkb_geometry_collection |
A heterogeneous collection of 2D geometries. This will be split into homogeneous geometries of points, lines, and polygons before being written. |
|
wkb_line |
2D Linear feature. |
|
wkb_multi_line |
2D Feature with multiple line geometries. |
|
wkb_multi_point |
2D Feature with multiple heterogeneous point geometries. |
|
wkb_multi_polygon |
2D Feature with multiple polygon geometries. |
|
wkb_none |
Absence of geometry. Can occur on read if there is a parsing error in the geometry. |
|
wkb_point |
2D Point feature. |
|
wkb_polygon |
2D Simple polygon or donut feature. |
|
wkb_unknown |
An unsupported geometry type other than those listed above. This may include optional or experimental geometry types. |
For more information, see the Mapbox Vector Tile Specification.