When you click a vector table in the Source data section of the Maps Engine catalog, the Data details page displays information about the data and its settings.
Anyone with access to the source data can edit these settings: Name, Description, Tags, Shared with, and Accessible by. You can't edit the system-captured information.
The following additional details provide information about the data source.
The type of shape represented in the source data:
The number of features in the source data, where a feature is a geometry and a set of attributes. Each geometry can consist of multiple points, multiple polygons, or multiple lines.
As an example, an archipelago can be one feature with multiple polygons, each of which represents a single island, or multiple features, each containing one of the islands in the archipelago.
|Bad feature count||All||
The number of features that generated errors upon upload. Some of the reasons that features are considered bad are as follows:
Each geometry consists of discrete location samples. Vertex count is the sum of such samples.
If this source data contains multi-polygons, the number present. A multi-polygon is a geometry that consists of multiple polygons, such as a land mass that includes lakes or a lake that includes islands. These inner shapes are listed here as inner lines but can be called inner loops, holes, or cut-outs in other contexts.
Note that multiple polygons that constitutes the geometry of a single feature can be treated either as a multi-polygon or as a set of polygons.
|Line count||Line||If this source data contains lines, the number present.|
|Multi-line count||Line||If this source data contains multi-lines, the number present. A multi-line is a geometry that consists of multiple lines, such as a highway whose segments are themselves lines, or a set of all the roads in a county.|
|Point count||Point||If this vector source data contains points, the number present.|
|Bounds||All||The East/West and North/South coordinates of the box that encloses this feature on a map. Google Maps Engine creates this box by drawing a North/South line at the most easterly and westerly points of the feature, and by drawing an East/West line at the northernmost and southernmost points of the feature. The bounding box contains all of the geometries in your file.|
|Altitude||All||The largest and smallest altitude values in the source data.|
|Attribute count||All||The number of attributes. These attributes are all listed under the Schema header.|
The following setting can be specified during upload or on this Details page.
|Source encoding||All||The character encoding type for the text in the source data. For example, if an ESRI shapefile has a DBF file, the encoding applies to the DBF file. For the list of supported encoding types, refer to Supported data formats and limits.|