Map Visualization Plot Tab

Layers

This table displays information about the inputs to the map node. The order of the layers dictates the order in which the layers are displayed in both the map preview and the visual output when the node is executed. The top row in the table is the ‘top’ layer and the bottom row is the ‘base’ layer; in other words, each layer is shown on the map in front of the layer directly below it in the table.

Note: Where a layer in the table contains a three-dimensional geospatial field only the x and y axes are plotted. The z axis is ignored.
Name
Names are automatically created for each layer and are made up using the following format: tag[source node:connected node]. By default, the tag is shown as a number, with 1 representing the first input that is connected, 2 for the second input, and so on. If required, press the Edit Layer button to change the tag in the Change Map Layer Options dialog box. For example, you might change the tag to be "roads" or "cities" to reflect the data input.
Type
Shows the measurement type icon of the geospatial field that is selected as the layer. If the input data contains multiple fields with a geospatial measurement type the default selection uses the following sort order:
  1. Point
  2. Linestring
  3. Polygon
  4. MultiPoint
  5. MultiLinestring
  6. MultiPolygon
Note: If there are two fields with the same measurement type, the first field (alphabetically by name) is selected by default.
Symbol
Note: This column is only completed for Point and MultiPoint fields.
Shows the symbol that is used for Point or MultiPoint fields. If required, press the Edit Layer button to change the symbol in the Change Map Layer Options dialog box.
Color
Shows the color that is selected to represent layer on the map. If required, press the Edit Layer button to change the color in the Change Map Layer Options dialog box. The color is applied to different items depending on the measurement type.
  • For Points or MultiPoints, the color is applied to the symbol for the layer.
  • For Linestrings and Polygons, the color is applied to the entire shape. Polygons always have a black outline; the color that is shown in the column is the color that is used to fill the shape.

Preview

This pane shows a preview of the current selection of inputs in the Layers table. The preview takes into account the order of layers, symbol, color, and any other display settings that are associated with the layers and, when possible, updates the display whenever the settings change. If you change details elsewhere in your stream, such as the geospatial fields to use as layers, or if you amend details such as associated aggregation functions, you might need to click the Refresh Data button to update the preview.

Use the Preview to set your display settings before you run your stream. To protect against time delays that could be caused by using a large dataset, the preview samples each layer and creates a display from the first 100 records.