geo

Namespace

geo

Description:

  • GeoJS

Source:
Copyright:
  • 2013-2022, Kitware, Inc.
License:
  • Apache-2.0

Classes

annotation
annotationLayer
camera
choroplethFeature
circleAnnotation
contourFeature
domRenderer
ellipseAnnotation
feature
featureLayer
fetchQueue
fileReader
geojsonReader
graphFeature
gridFeature
heatmapFeature
imageTile
isolineFeature
layer
lineAnnotation
lineFeature
map
mapInteractor
markerFeature
meshFeature
object
osmLayer
pathFeature
pixelmapFeature
pixelmapLayer
pointAnnotation
pointFeature
polygonAnnotation
polygonFeature
quadFeature
rectangleAnnotation
renderer
sceneObject
squareAnnotation
textFeature
tile
tileCache
tileLayer
timestamp
trackFeature
transform
vectorFeature

Namespaces

action
annotation
canvas
event
gui
registries
svg
util
vtkjs
webgl

Members

(static, constant) sha :string

Description:

  • The current geojs git SHA.

Source:

The current geojs git SHA.

Type:
  • string

(static, constant) version :string

Description:

  • The current geojs version.

Source:

The current geojs version.

Type:
  • string

Methods

(static) adjustLayerForRenderer(name, layer)

Description:

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

Source:
Parameters:
Name Type Description
name string

Name of the layer or adjustment.
layer object

Instantiated layer object.

(static) checkRenderer(name, noFallbackopt) → {string|null|false}

Description:

  • 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.

Source:
Parameters:
Name Type Attributes Description
name string | null

Name of the desired renderer.
noFallback boolean <optional>

If truthy, don't recommend a fallback.
Returns:

The name of the renderer that should be used or false if no valid renderer can be determined.

Type
string | null | false

(static) createAnnotation(name, options) → (nullable) {object}

Description:

  • Create an annotation based on a registered type.

Source:
Parameters:
Name Type Description
name string

The annotation name
options object

The options for the annotation.
Returns:

the new annotation.

Type
object

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

Description:

  • Create new instance of a feature.

Source:
Parameters:
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:

The new feature or null if no such name is registered.

Type
geo.feature | null

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

Description:

  • Create a new file reader.

Source:
Parameters:
Name Type Description
name string

Name of the reader to create.
opts object

Options for the new reader.
Returns:

The new reader or null if no such name is registered.

Type
geo.fileReader | null

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

Description:

  • Create new instance of the layer.

Source:
Parameters:
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:

The new layer or null if no such name is registered.

Type
geo.layer | null

(static) createRenderer(name, layer, canvasopt, optionsopt) → {geo.renderer|null}

Description:

  • Create new instance of the renderer.

Source:
Parameters:
Name Type Attributes 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 <optional>

Options for the new renderer.
Returns:

The new renderer or null if no such name is registered.

Type
geo.renderer | null

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

Description:

  • Create new instance of a dom widget.

Source:
Parameters:
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:

The new widget.

Type
geo.widget

(static) featuresForAnnotations(annotationList) → {Array.<string>}

Description:

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

Source:
Parameters:
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:

a list of features needed for the specified annotations. There may be duplicates in the list.

Type
Array.<string>

(static) listAnnotations() → {Array.<string>}

Description:

  • Get a list of registered annotation types.

Source:
Returns:

A list of registered annotations.

Type
Array.<string>

(static) registerAnnotation(name, func, features) → {object}

Description:

  • Register a new annotation type.

Source:
Parameters:
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:

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

Type
object

(static) registerFeature(category, name, func, capabilities) → {object}

Description:

  • Register a new feature type.

Source:
Parameters:
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:

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

Type
object

(static) registerFileReader(name, func)

Description:

  • Register a new file reader type.

Source:
Parameters:
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.

(static) registerLayer(name, func, defaultFeaturesopt)

Description:

  • Register a new layer type.

Source:
Parameters:
Name Type Attributes 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.

(static) registerLayerAdjustment(category, name, func) → {object}

Description:

  • 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.

Source:
Parameters:
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:

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

Type
object

(static) registerRenderer(name, func)

Description:

  • Register a new renderer type.

Source:
Parameters:
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.

(static) registerWidget(category, name, func) → {object}

Description:

  • Register a new widget type.

Source:
Parameters:
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:

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

Type
object

(static) rendererForAnnotations(annotationList) → {string|null|false}

Description:

  • 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.

Source:
Parameters:
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:

the name of the renderer that should be used or false if no valid renderer can be determined.

Type
string | null | false

(static) rendererForFeatures(featureList) → {string|null|false}

Description:

  • 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.

Source:
Parameters:
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:

The name of the renderer that should be used or false if no valid renderer can be determined.

Type
string | null | false

Type Definitions

actionRecord

Description:

  • The conditions that are necessary to make an action occur.

Source:
Properties:
Name Type Attributes 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.

The conditions that are necessary to make an action occur.

Type:
  • object

actionState

Description:

  • The current action state a map interactor.

Source:
Properties:
Name Type Attributes 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.

The current action state a map interactor.

Type:
  • object

brushSelection

Description:

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

Source:
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.

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

Type:
  • object

geoBounds

Description:

  • General representation of rectangular bounds in world coordinates.

Source:
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.

General representation of rectangular bounds in world coordinates.

Type:
  • object

geoColor

Description:

  • 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 hexadecimal with each channel on a scale between 0 and 255 (ff). Case insensitive.
    • #rrggbbaa The color and opacity specified in hexadecimal with each channel on a scale between 0 and 255 (ff). Case insensitive.
    • #rgb The color specified in hexadecimal with each channel on a scale between 0 and 15 (f). Case insensitive.
    • #rgba The color and opacity specified in hexadecimal 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 interpreted 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.

Source:

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 hexadecimal with each channel on a scale between 0 and 255 (ff). Case insensitive.
  • #rrggbbaa The color and opacity specified in hexadecimal with each channel on a scale between 0 and 255 (ff). Case insensitive.
  • #rgb The color specified in hexadecimal with each channel on a scale between 0 and 15 (f). Case insensitive.
  • #rgba The color and opacity specified in hexadecimal 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 interpreted 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.

Type:

geoColorObject

Description:

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

Source:
Properties:
Name Type Attributes 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.

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

Type:
  • object

geoPosition

Description:

  • General representation 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.

Source:
Properties:
Name Type Attributes Default Description
x number

Horizontal coordinate, often degrees longitude.
y number

Vertical coordinate, often degrees latitude.
z number <optional>
 0

Altitude coordinate.

General representation 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.

Type:
  • object

geoPositionFlat

Description:

  • General representation 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. This is a list of numbers consisting of either [x, y] or [x, y, z], where therse are the horizontal, vertical, and altitude coordinates.

Source:

General representation 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. This is a list of numbers consisting of either [x, y] or [x, y, z], where therse are the horizontal, vertical, and altitude coordinates.

Type:
  • Array.<number>

geoSize

Description:

  • Representation of a size in gcs coordinates.

Source:
Properties:
Name Type Description
width number

Width in gcs coordinates.
height number

Height in gcs coordinates.

Representation of a size in gcs coordinates.

Type:
  • object

modifierKeys

Description:

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

Source:
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.

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

Type:
  • object

mouseButtons

Description:

  • The status of all mouse buttons.

Source:
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.

The status of all mouse buttons.

Type:
  • object

mouseState

Description:

  • The state of the mouse.

Source:
Properties:
Name Type Description
page geo.screenPosition

Mouse position relative to the page.
map geo.geoPosition

Mouse position relative to the map.
geo geo.geoPosition

Mouse position in map interface gcs.
mapgcs geo.geoPosition

Mouse position in map gcs
buttons object

Which mouse buttons are down.

Properties
Name Type Description
left boolean

State of the left mouse button.
right boolean

State of the right mouse button.
middle boolean

State of the middle mouse button.
modifiers object

Which modifier keys are down.

Properties
Name Type Description
alt boolean

State of the alt key.
ctrl boolean

State of the ctrl key.
shift boolean

State of the shift key.
meta boolean

State of the meta key.
time number

Time (epoch ms) the event was captured.
deltaTime number

Time elapsed (ms) since the last mouse event.
velocity geo.screenPosition

Mouse speed in pixels/ms.

The state of the mouse.

Type:
  • object

mouseState

Description:

  • The state of the mouse.

Source:
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.

The state of the mouse.

Type:
  • object

point2D

Description:

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

Source:
Properties:
Name Type Description
x number

Horizontal coordinate.
y number

Vertical coordinate.

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

Type:
  • object

polygon

Description:

  • Polygon.

Source:

Polygon.

Type:

polygonAny

Description:

  • A polygon in any of a variety of formats.

    This can be any object with a toPolygonList and fromPolygonList method.

Source:

A polygon in any of a variety of formats.

This can be any object with a toPolygonList and fromPolygonList method.

Type:

polygonFlat

Description:

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

Source:

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

Type:

polygonList

Description:

  • A list of flat polygon lists.

Source:

A list of flat polygon lists.

Type:

polygonObject

Description:

  • Polygon as a object. The polygon may have holes.

Source:
Properties:
Name Type Attributes 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.

Polygon as a object. The polygon may have holes.

Type:
  • object

screenBounds

Description:

  • General representation of rectangular bounds in pixel coordinates.

Source:
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.

General representation of rectangular bounds in pixel coordinates.

Type:
  • object

screenPosition

Description:

  • General representation of a point on the screen.

Source:
Properties:
Name Type Description
x number

Horizontal coordinate in pixels.
y number

Vertical coordinate in pixels.

General representation of a point on the screen.

Type:
  • object

screenSize

Description:

  • Representation of a size in pixels.

Source:
Properties:
Name Type Description
width number

Width in pixels.
height number

Height in pixels.

Representation of a size in pixels.

Type:
  • object

worldPosition

Description:

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

Source:
Properties:
Name Type Attributes Default Description
x number

Horizontal coordinate in map coordinates.
y number

Vertical coordinate in map coordinates.
z number <optional>
 0

Altitude coordinate, often zero.

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

Type:
  • object

zoomAndCenter

Description:

  • A location and zoom value.

Source:
Properties:
Name Type Description
center geo.geoPosition

The center coordinates.
zoom number

The zoom level.

A location and zoom value.

Type:
  • object