Namespace: geo

Classes

annotation

annotationLayer

camera

choroplethFeature

contourFeature

domRenderer

feature

featureLayer

fetchQueue

fileReader

geojsonReader

graphFeature

heatmapFeature

imageTile

isolineFeature

layer

lineAnnotation

lineFeature

map

mapInteractor

meshFeature

object

osmLayer

pathFeature

pixelmapFeature

pointAnnotation

pointFeature

polygonAnnotation

polygonFeature

quadFeature

rectangleAnnotation

renderer

sceneObject

textFeature

tile

tileCache

tileLayer

timestamp

transform

vectorFeature

Namespaces

action

canvas

event

gui

registries

svg

util

vtkjs

webgl

Type Definitions

geo.actionRecordobject

The conditions that are necessary to make an action occur.

Properties:

Name	Type	Argument	Description
action	string		The name of the action, from (@link geo.action}.
owner	string	<optional>	A name of an owning process that can be used to locate or filter actions.
name	string	<optional>	A human-readable name that can be used to locate or filter actions.
input	string | object		The name of an input that is used for the action, or an object with input names as keys and boolean values of inputs that are required to occur or required to not occur to trigger the action. Input names include left, right, middle (for mouse buttons), wheel (the mouse wheel), pan (touch pan), rotate (touch rotate).
modifiers	string | object	<optional>	The name of a modifier key or an object with modifiers as the keys and boolean values. The listed modifiers must be set or unset depending on the boolean value. Modifiers include shift, ctrl, alt, and meta.
selectionRectangle	boolean | string	<optional>	If truthy, a selection rectangle is shown during the action. If a string, the name of an event that is triggered when the selection is complete.

geo.actionStateobject

The current action state a map interactor.

Properties:

Name	Type	Argument	Description
action	string		Name of the action that is being handled.
actionRecord	geo.actionRecord		The action record which triggered the current action.
origAction	string	<optional>	The name of an action that triggered this action.
origin	geo.mouseState		The mouse state at the start of the action.
initialZoom	number		The zoom level at the start of the action.
initialRotation	number		The map's rotation in radians at the start of the action.
initialEventRotation	number		The rotation reported by the event that triggered this action. For example, this could be the angle between two multi-touch points.
delta	object		The total movement of during the action in gcs coordinates. Properties Name Type Description x number The horizontal movement during the action. y number The vertical movement during the action.
boundDocumentHandlers	boolean		true if the mouse is down and being tracked.
start	Date	<optional>	The time when the action started.
handler	function	<optional>	A function to call on every animation from while the action is occurring.
momentum	geo.mouseState	<optional>	The mouse location when a momentum action starts.
zoomrotateAllowRotation	boolean	<optional>	Truthy if enough movement has occurred that rotations are allowed.
zoomrotateAllowZoom	boolean	<optional>	Truthy if enough movement has occurred that zooms are allowed.
zoomrotateAllowPan	boolean	<optional>	Truthy if enough movement has occurred that pans are allowed.
lastRotationDelta	number	<optional>	When rotating, the last amount that was rotated from the start of the action. This is used to debounce jitter on touch events.
initialEventGeo	geo.geoPosition	<optional>	The position of the mouse when significant movement first occurred.

geo.brushSelectionobject

The current brush selection (this is when a rectangular area is selected by dragging).

Properties:

Name	Type	Description
display	geo.screenBounds	The selection bounds in pixel space.
gcs	object	The selection bounds in the map's gcs. Properties Name Type Description upperLeft geo.geoPosition Upper left corner. upperRight geo.geoPosition Upper right corner. lowerLeft geo.geoPosition Lower left corner. lowerRight geo.geoPosition Lower right corner.
mouse	geo.mouseState	The current mouse state.
origin	geo.mouseState	The mouse state at the start of the brush action.

geo.geoBoundsobject

General representation of rectangular bounds in world coordinates.

Properties:

Name	Type	Description
left	number	Horizontal coordinate of the top-left corner.
top	number	Vertical coordinate of the top-left corner.
right	number	Horizontal coordinate of the bottom-right corner.
bottom	number	Vertical coordinate of the bottom-right corner.

geo.geoColorgeo.geoColorObject string number

A color value. Although opacity can be specified, it is not always used. When a string is specified, any of the following forms can be used:

• CSS color name
• #rrggbb The color specified in hexadecmial with each channel on a scale between 0 and 255 (ff). Case insensitive.
• #rrggbbaa The color and opacity specified in hexadecmial with each channel on a scale between 0 and 255 (ff). Case insensitive.
• #rgb The color specified in hexadecmial with each channel on a scale between 0 and 15 (f). Case insensitive.
• #rgba The color and opacity specified in hexadecmial with each channel on a scale between 0 and 15 (f). Case insensitive.
• rgb(R, G, B), rgb(R, G, B, A), rgba(R, G, B), rgba(R, G, B, A) The color with the values of each color channel specified as numeric values between 0 and 255 or as percent (between 0 and 100) if a percent % follows the number. The alpha (opacity) channel is optional and can either be a number between 0 and 1 or a percent. White space may appear before and after numbers, and between the number and a percent symbol. Commas are not required. A slash may be used as a separator before the alpha value instead of a comma. The numbers conform to the CSS number specification, and can be signed floating-point values, possibly with exponents.
• hsl(H, S, L), hsl(H, S, L, A), hsla(H, S, L), hsla(H, S, L, A) Hue, saturation, and lightness with optional alpha (opacity). Hue is a number between 0 and 360 and is interpretted as degrees unless an angle unit is specified. CSS units of deg, grad, rad, and turn are supported. Saturation and lightness are percentages between 0 and 100 and must be followed by a percent % symbol. The alpha (opacity) channel is optional and is specified as with rgba(R, G, B, A).
• transparent Black with 0 opacity.

When a number, this is an integer of the form 0xrrggbb or its decimal equivalent. For example, 0xff0000 or 16711680 are both solid red.

See https://developer.mozilla.org/en-US/docs/Web/CSS/color_value for more details on CSS color values.

geo.geoColorObjectobject

A color value represented as an object. Although opacity can be specified, it is not always used.

Properties:

Name	Type	Argument	Description
r	number		The red intensity on a scale of [0-1].
g	number		The green intensity on a scale of [0-1].
b	number		The blue intensity on a scale of [0-1].
a	number	<optional>	The opacity on a scale of [0-1]. If unspecified and used, it should be treated as 1.

geo.geoPositionobject

General represention of a point on the earth. The coordinates are most commonly in longitude and latitude, but the coordinate system is changed by the interface gcs.

Properties:

Name	Type	Argument	Default	Description
x	number			Horizontal coordinate, often degrees longitude.
y	number			Vertical coordinate, often degrees latitude.
z	number	<optional>	0	Altitude coordinate.

geo.modifierKeysobject

The status of all modifier keys. These are usually copied from the standard DOM events.

Properties:

Name	Type	Description
alt	boolean	True if the alt or option key is down.
ctrl	boolean	True if the control key is down.
shift	boolean	True if the shift key is down.
meta	boolean	True if the meta, windows, or command key is down.

geo.mouseButtonsobject

The status of all mouse buttons.

Properties:

Name	Type	Description
left	boolean	True if the left mouse button is down.
right	boolean	True if the right mouse button is down.
middle	boolean	True if the middle mouse button is down.

geo.mouseStateobject

The state of the mouse.

Properties:

Name	Type	Description
page	geo.screenPosition	Mouse location in pixel space relative to the entire browser window.
map	geo.screenPosition	Mouse location in pixel space relative to the map DOM node.
geo	geo.geoPosition	Mouse location in interface gcs space.
mapgcs	geo.geoPosition	Mouse location in gcs space.
buttons	geo.mouseButtons	The current state of the mouse buttons.
modifiers	geo.modifierKeys	The current state of all modifier keys.
time	Date	The timestamp the event took place.
deltaTime	number	The time in milliseconds since the last mouse event.
velocity	geo.screenPosition	The velocity of the mouse pointer in pixels per millisecond.

geo.point2Dobject

General represention of a two-dimensional point in any coordinate system.

Properties:

Name	Type	Description
x	number	Horizontal coordinate.
y	number	Vertical coordinate.

geo.polygongeo.polygonFlat geo.polygonObject

Polygon.

geo.polygonFlatArray.<geo.geoPosition>

Polygon as a flat array. An array of vertices. The polygon has no holes. The first and last point of may be the same.

geo.polygonObjectobject

Polygon as a object. The polygon may have holes.

Properties:

Name	Type	Argument	Description
outer	Array.<geo.geoPosition>		An array of vertices defining the outside of the polygon. The first and last point of may be the same.
inner	Array.<Array.<geo.geoPosition>>	<optional>	An array of holes, each of which is an array of vertices. The first and last point of may be the same.

geo.screenBoundsobject

General representation of rectangular bounds in pixel coordinates.

Properties:

Name	Type	Description
upperLeft	geo.screenPosition	Upper left corner.
upperRight	geo.screenPosition	Upper right corner.
lowerLeft	geo.screenPosition	Lower left corner.
lowerRight	geo.screenPosition	Lower right corner.

geo.screenPositionobject

General representation of a point on the screen.

Properties:

Name	Type	Description
x	number	Horizontal coordinate in pixels.
y	number	Vertical coordinate in pixels.

geo.screenSizeobject

Represention of a size in pixels.

Properties:

Name	Type	Description
width	number	Width in pixels.
height	number	Height in pixels.

geo.worldPositionobject

Represention of a point on the map. The coordinates are in the map's reference system, possibly with an affine transformation.

Properties:

Name	Type	Argument	Default	Description
x	number			Horizontal coordinate in map coordinates.
y	number			Vertical coordinate in map coordinates.
z	number	<optional>	0	Altitude coordinate, often zero.

geo.zoomAndCenterobject

A location and zoom value.

Properties:

Name	Type	Description
center	geo.geoPosition	The center coordinates.
zoom	number	The zoom level.

Static Members

static,constantgeo.shastring

The current geojs git SHA.

static,constantgeo.versionstring

The current geojs version.

Static Methods

staticgeo.adjustLayerForRenderer(name, layer)

registry.js, line 270

If a layer needs to be adjusted based on the renderer, call the function that adjusts it.

Name	Type	Description
name	string	Name of the layer or adjustment.
layer	object	Instantiated layer object.

staticgeo.checkRenderer(name, noFallback){string|null|false}

registry.js, line 90

Check if the named renderer is supported. If not, display a warning and get the name of a fallback renderer. Ideally, we would pass a list of desired features, and, if the renderer is unavailable, this would choose a fallback that would support those features.

Name	Type	Description
name	string | null	Name of the desired renderer.
noFallback	boolean	If truthy, don't recommend a fallback.

Returns:

Type	Description
string | null | false	The name of the renderer that should be used or false if no valid renderer can be determined.

staticgeo.createAnnotation(name, options){object}

registry.js, line 407

Create an annotation based on a registered type.

Name	Type	Description
name	string	The annotation name
options	object	The options for the annotation.

Returns:

Type	Description
object	the new annotation.

staticgeo.createFeature(name, layer, renderer, arg){geo.feature|null}

registry.js, line 217

Create new instance of a feature.

Name	Type	Description
name	string	Name of the feature to create.
layer	geo.layer	The layer associated with the feature.
renderer	geo.renderer	The renderer associated with the feature. This is usually layer.renderer().
arg	object	Options for the new feature.

Returns:

Type	Description
geo.feature | null	The new feature or null if no such name is registered.

staticgeo.createFileReader(name, opts){geo.fileReader|null}

registry.js, line 36

Create a new file reader.

Name	Type	Description
name	string	Name of the reader to create.
opts	object	Options for the new reader.

Returns:

Type	Description
geo.fileReader | null	The new reader or null if no such name is registered.

staticgeo.createLayer(name, map, arg){geo.layer|null}

registry.js, line 306

Create new instance of the layer.

Name	Type	Description
name	string	Name of the layer to create.
map	geo.map	The map class instance that owns the layer.
arg	object	Options for the new layer.

Returns:

Type	Description
geo.layer | null	The new layer or null if no such name is registered.

staticgeo.createRenderer(name, layer, canvas, options){geo.renderer|null}

registry.js, line 67

Create new instance of the renderer.

Name	Type	Description
name	string	Name of the renderer to create.
layer	geo.layer	The layer associated with the renderer.
canvas	HTMLCanvasElement	optional A canvas object to share between renderers.
options	object	Options for the new renderer.

Returns:

Type	Description
geo.renderer | null	The new renderer or null if no such name is registered.

staticgeo.createWidget(name, layer, arg){geo.widget}

registry.js, line 360

Create new instance of a dom widget.

Name	Type	Description
name	string	Name of the widget to create.
layer	geo.layer	The layer associated with the widget.
arg	object	Options for the new widget.

Returns:

Type	Description
geo.widget	The new widget.

staticgeo.featuresForAnnotations(annotationList){Array.<string>}

registry.js, line 440

Get a list of required features for a set of annotations.

Name	Type	Description
annotationList	Array.<string> | object | undefined	A list of annotations that will be used. Instead of a list, if this is an object, the keys are the annotation names, and the values are each a list of modes that will be used with that annotation. For example, ['polygon', 'rectangle'] lists features required to show those annotations in any mode, whereas {polygon: [annotationState.done], rectangle: [annotationState.done]} only lists features that are needed to show the completed annotations.

Returns:

Type	Description
Array.<string>	a list of features needed for the specified annotations. There may be duplicates in the list.

staticgeo.listAnnotations(){Array.<string>}

registry.js, line 422

Get a list of registered annotation types.

Returns:

Type	Description
Array.<string>	A list of registered annotations.

staticgeo.registerAnnotation(name, func, features){object}

registry.js, line 390

Register a new annotation type.

Name	Type	Description
name	string	The annotation name.
func	function	A function to call to create the annotation.
features	object | undefined	A map of features that are used by this annotation. Each key is a feature that is used. If the value is true, the that feature is always needed. If a list, then it is the set of annotation states for which that feature is required. These can be used to pick an appropriate renderer when creating an annotation layer.

Returns:

Type	Description
object	if this annotation replaces an existing one, this was the value that was replaced. In this case, a warning is issued.

staticgeo.registerFeature(category, name, func, capabilities){object}

registry.js, line 190

Register a new feature type.

Name	Type	Description
category	string	The feature category -- this is the renderer name.
name	string	The feature name.
func	function	A function to call to create the feature.
capabilities	object | undefined	A map of capabilities that this feature supports. If the feature is implemented with different capabilities in multiple categories (renderers), then the feature should expose a simple dictionary of supported and unsupported features. For instance, the quad feature has color quads, image quads, and image quads that support full transformations. The capabilities should be defined in the base feature in a capabilities object so that they can be referenced by that rather than an explicit string.

Returns:

Type	Description
object	if this feature replaces an existing one, this was the feature that was replaced. In this case, a warning is issued.

staticgeo.registerFileReader(name, func)

registry.js, line 23

Register a new file reader type.

Name	Type	Description
name	string	Name of the reader to register. If the name already exists, the class creation function is replaced.
func	function	Class creation function.

staticgeo.registerLayer(name, func, defaultFeatures)

registry.js, line 291

Register a new layer type.

Name	Type	Description
name	string	Name of the layer to register. If the name already exists, the class creation function is replaced.
func	function	Class creation function.
defaultFeatures	Array.<string>	optional An optional list of feature capabilities that are required to use this layer.

staticgeo.registerLayerAdjustment(category, name, func){object}

registry.js, line 249

Register a layer adjustment. Layer adjustments are appiled to specified layers when they are created as a method to mixin specific changes, usually based on the renderer used for that layer.

Name	Type	Description
category	string	The category for the adjustment; this is commonly the renderer name.
name	string	The name of the adjustment; this is commonly the layer type, or 'all' for the base layer class.
func	function	The function to call when the adjustment is used.

Returns:

Type	Description
object	if this layer adjustment replaces an existing one, this was the value that was replaced. In this case, a warning is issued.

staticgeo.registerRenderer(name, func)

registry.js, line 51

Register a new renderer type.

Name	Type	Description
name	string	Name of the renderer to register. If the name already exists, the class creation function is replaced.
func	function	Class creation function.

staticgeo.registerWidget(category, name, func){object}

registry.js, line 338

Register a new widget type.

Name	Type	Description
category	string	A category for this widget. This is usually 'dom'.
name	string	The name of the widget to register.
func	function	Class creation function.

Returns:

Type	Description
object	If this widget replaces an existing one, this was the value that was replaced. In this case, a warning is issued.

staticgeo.rendererForAnnotations(annotationList){string|null|false}

registry.js, line 478

Check if there is a renderer that is supported and supports a list of annotations. If not, display a warning. This generates a list of required features, then picks the first renderer that supports all of these features.

Name	Type	Description
annotationList	Array.<string> | object | undefined	A list of annotations that will be used with this renderer. Instead of a list, if this is an object, the keys are the annotation names, and the values are each a list of modes that will be used with that annotation. See featuresForAnnotations for more details.

Returns:

Type	Description
string | null | false	the name of the renderer that should be used or false if no valid renderer can be determined.

staticgeo.rendererForFeatures(featureList){string|null|false}

registry.js, line 130

Check if there is a renderer that is supported and supports a list of features. If not, display a warning. This picks the first renderer that supports all of the listed features.

Name	Type	Description
featureList	Array.<string> | undefined	A list of features that will be used with this renderer. Features are the basic feature names (e.g., 'quad'), or the feature name followed by a required capability (e.g., 'quad.image'). If more than one feature or more than one capability of a feature is required, include each feature and capability combination in the list (e.g., ['quad.image', 'plane']). If no capability is specified for a feature (or that feature was registered without a capability object), then the feature will match regardless of capabilities.

Returns:

Type	Description
string | null | false	The name of the renderer that should be used or false if no valid renderer can be determined.