A Bubble Layer displays symbols (circles, other shapes or symbols from an URL) and optionally labels at an GeoAnalytics Map. Size and color can be controlled by measures, labels and pop-up information by expressions. The position can be specified either as location ids (common names such as country codes, state codes, city names, postal codes etc) or latitude, longitude values.
The dimension represents an identity of the the point. It can also be used as the location id, see "Location Options".
These are the measures. When coordinates are available specify measures like this:
- latitude - the latitude of the point (WGS 84)
- longitude - the longitude of the point (WGS 84)
- size - a numeric measure that controls size, by default the size is auto scaled between the lowest and highest value
- Location ID - an identifier that can be used for looking up a location (see Location Options)
- size - a numeric measure that controls size, by default the size is auto scaled between the lowest and highest value
|Map ID||default:<the most recent map of the sheet>||Specify this value when there is more than one map on a sheet to tell which map to display the layer on. See Map Id in Map Settings of the Map to get the right one.|
|Maximum Number of Objects||default:1000||To display more than a thousand object increase this value. There will be a warning if there are more objects to display.|
|Calculation Condition||required||To limit when the layer is shown you can enter a caluclation condition as an expression. The layer is calculated/shown only when the expression is fulfilled.|
|Calculation Condition Message||required||A custom error message that will be displayed in the layers legend if the calculation condition is not fulfilled. Only visible if a calculation condition has been entered.|
|Zoom Limit||default:Min 0, Max 160000||The layer will not be displayed when zoomed further in/out than these values. To set a limit to the current scale, drag the upper or lower limit towards the other and it will snap to the current scale.|
|Restrict Drill Down||default:0-16||When the dimension is a drill down group it is possible to restrict the layer to be active only for a a range of levels. This makes it easy to create different layers that are active in the different levels of the drill down. The top level is number 0. The range selected specifies at what levels the layer should be visible.|
|Include in Auto Zoom||default:Yes||Determines if the layer should be included when calculating area to zoom to when automatically zooming to selections.|
|Draw Order||default:Auto||Defines how the layer should be drawn compared to other layers, which ones should be drawn on top of each other.|
|Draw Order Category||default:<Layer specific>||The layers are by default drawn after the base map and the base map labels in the order Geodata Layers, Area Layers, Heatmap Layers, Line Layers, Bubble Layers. To make this layer draw in another category, adjust this value. This property is only visible when "Draw Order" is set to "Custom".|
|Draw Order Adjustment||default:0||Increasing this value makes the layer draw later, i.e. be more visible in the category. Allowed values are in the range -10 to 10. If you want the layer to be on top of other layers in the same category increase this value, if you want it to be overdrawn by other layers in the category decrease it. This property is only visible when "Draw Order" is set to "Custom".|
Location information is either specified as longitude, latitude pairs, as identities that are looked up in an external service or as sense geometries. When the term "Location ID" is used below it means it can be a sense geometry or an identity looked up else where. When it starts with a "[" it is assumed to be a geometry in a string ([long,lat] is a point, [[long1,lat1],[long2,lat2],...] is a line, [[[long1,lat1],[long2,lat2],...]] is a multi-line or a polygon with multiple rings, [[[[long1,lat1],[long2,lat2],...]]] is a multi-polygon but also accepted as a multi-line). The external service can be something as simple as a geometry file or a more complex server based service. The server based services provide a syntax for specifying more information on identities to minimize false hits. For instance containing areas and types of features can be specified. The following is the city Hamburg in Germany:
Hamburg,DEand this is Hamburg in Sweden:
Hamburg,SEIf you actually wanted the first order administrative area in Germany named Hamburg you also need to specify a type:
Hamburg:AADM1,DEYou can also specify multiple areas when needed. For instance in USA there are many Hamburg. To get the one in Arkansas specify:
Hamburg,AR,USSee Location Service Specification for more information on syntax to use. When there are unresolved names a warning is displayed in the upper left corner of the map.
Where location information comes from.
|Location Service||default:different for different types of geometries||URL to the location service. Either a server based service or a file as specified in "Location Service Type". An expression is accepted which makes it possible to change source dynamically. This can be used for switching file in different drill down levels for instance.|
|Location Service Type||default:Geometry service||The type of service used for location ID lookup.|
|Source Key Attribute||optional||The attribute in a geometry file to use as the location ID. This field is only visible when a file based geometry service is selected.|
|Advanced Location||default:false||The advanced location toggle controls whether to use Advanced Loction, in essence whether to use Location ID Suffix or to use Country and Type.|
|Country||default:any||The Country dropdown can be used to narrow down a lookup of a location id. Using Country is a simplified way of using Location ID Suffix (see below).|
|Type||default:any||The Type dropdown can be used to narrow down a lookup of a location id. Using Country is a simplified way of using Location ID Suffix (see below).|
|Location ID Suffix||default:||
The specified string is appended to all IDs.
This is a convenient way to specify more information to server based location services such as country code or type.
The alternative is to use an expression in the measure that appends extra information.
With the following suffix all items are specified to be cities in Sweden:
:P*,SESee Location Service Specification for more information on syntax to use.
This provides an easy fix for incorrect location IDs. To change them to something else use a syntax like:
"value1":"remapped value1", "value2":"remapped value2", ...
|Geometry Attribute||default:the_geom||The name of the attribute that contains the geometry (without name space). This field is only visible when Location Service Type is GML/WFS.|
|Reverse Coordinates||default:unchecked||Coordinates are expected in order latitude, longitude or Y, X. Check when coordinates comes in the other order. This field is only visible when Location Service Type is GML/WFS.|
|Show titles||default:Off||Display standard title.|
|Size Legend||default:Auto||Controls if visibility of the parts in the left side of the legend should be in Auto or Custom.|
|Show Sizes||default:Checked||Turn on/off the bubbles that shows min and max size. This option is only visible when "Size legend" is Custom.|
|Show Size Min/Max Values||default:Checked||Turn on/off the text labels for min and max value. This option is only visible when "Size legend" is Custom.|
|Show Size Title||default:Checked||Turn on/off the label at the left side of the legend. This option is only visible when "Size legend" is Custom.|
|Color Legend||default:Auto||Controls if visibility of the parts in the right side of the legend should be in Auto or Custom.|
|Show Colors||default:Checked||Turn on/off the color bar. This option is only visible when "Color legend" is Custom.|
|Show Color Min/Max Values||default:Checked||Turn on/off the text labels for color values. This option is only visible when "Color legend" is Custom.|
|Show Color Title||default:Checked||Turn on/off the label at the right side of the legend. This option is only visible when "Color legend" is Custom.|
Appearance: Shape and Size
The shape of the symbols.
Supports various shapes as alternatives to bubbles, such as triangles, squares, pentagons, hexagons and bars.
Also custom symbols (png, gif, jpg, svg etc) from URLs are supported.
Note that the behavior of bars is a bit different from the other shapes in that it grows only upwards.
Possible values are:
|Radius/Width Min/Max||default:Min 5 - Max 20||The minimum/maximum size of bubbles in pixels. The lowest/highest value will be mapped to this size. This property is not available if Shape is Bars or Symbols.|
|Width||default:10||The width of each bar in pixels. This property is only available if Shape is Bars.|
|Min Height||default:0||The minimum height of bars in pixels. The lowest value will be mapped to this height. This property is only available if Shape is Bars.|
|Max Height||default:20||The maximum size of bubbles in pixels. The highest value will be mapped to this size. This property is only available if Shape is Bars.|
|Min Radius Value||default:Auto||The value in the data that is mapped to the smallest bubbles, i.e. bubbles with size "Min Radius". When set to Auto this value is set to the lowest value in the selection. This has the effect that the bubble size might change for a particular point when the selection changes. If this is not the desired behavior, specify a value here.|
|Max Radius Value||default:Auto||The value in the data that is mapped to the largest bubbles, i.e. bubbles with size "Max Radius". When set to Auto this value is set to the highest value in the selection. This has the effect that the bubble size might change for a particular point when the selection changes. If this is not the desired behavior, specify a value here.|
|Image URL||default:||The URL of the symbol image to use. Supports at least the formats png, gif, jpg and svg (browser dependent). Note that the field is an expression and that the URL should be enclosed in single quotes. Also note that the image must be accessible to the GeoAnalytics server which means that it will need to be on the Internet (if you are not hosting your own GeoAnalytics server). This property is only available if Shape is Symbols.|
|Scale||default:1.0||The scale of the symbol image, where 1.0 represents the original image size, 0.5 half and 2.0 double the size. Note that the field is an expression so different symbols can therefore have different scales.|
|Rotation||default:0||The rotation, in degrees, of the symbol image. Note that the field is an expression so different symbols can therefore have different rotations.|
|Colors||default:Auto||In Auto a default single color will be used.|
|Colors Drop Down||default:By Measure||Choose between "Single Color" "By Dimension", "By Measure" and "By Expression". "By Dimension" lets you select a dimension to color by. "By Measure" lets you select a measure to color by. "By Expression" requires for technical reasons that there is at least one measure. Additional options are displayed for the particular choices.|
|Transparency||default:0||A slider that controls transparency of objects from no transparency to invisible.|
|Outline Color||default:#aaaaaa||Determines outline color of features. If the field is empty the default value is used. All valid CSS colors can be used.|
|Show Label||default:unchecked||When checked, the label defined by the expression is displayed at each object.|
|Label||default:||An expression that is displayed as a label next to each object. Only visible when "Show Label" is checked.|
|Out Resolution Limit||default:99999999||The label will not be displayed when zoomed further out than this value. Check "Map.Debug.Show debug info" to see current resolution. The resolution is defined as meters per pixel, i.e. the number of meters each pixel covers. Only visible when "Show Label" is checked.|
|Set to Current Resolution||default:||A button that sets the label resolution limit to the current resolution.|
|Position||default:Below||The position of the label compared to the bubble. Available values are Below, Above and Centered.|
Appearance: Info Bubble
|Show Info Bubble||default:Checked||When checked, a pop-up is displayed when hovering above the object.|
When set to Auto, the dimension and measures are displayed in the pop-up.
When Custom, an expression defines what should be displayed.
HTML tags can be used for formatting.
For instance assuming there is a field [City Name]:
|Format Numbers||default:Checked||When checked, numeric values are rounded and displayed with suffixes such as k, M, G etc. Only visible when "Show Info Bubble" is checked.|
|Format||default:Auto||When Auto all numbers are formatted. When Custom, it is possible to specify which numbers should be formatted. Specify 1 for first number, 2 for second etc. Separate with comma. This option is only visible when "Format Numbers" is checked.|