ArcGIS API for JavaScript

49 Pages·2017·6.41 MB·English

ArcGIS API for JavaScript: Data
Visualization
Ben Ramseth & Rene Rubalcava
Data Visualization – Why?
Visual exploration:
•
- Anomalies in the data
- Trends
- Change detection
Display of analytical results
•
Interactivity (e.g. highlighting selections)
•
How about this?
Data Visualization – Where?
• Server – side X: -14.55° • Client – side
Y: 45.2°
Server - side rendering
Layer Infos / LayerDrawingOptions (apply renderers to layers-
•
ArcGISDynamicMapServiceLayer)
Map service with asynchronous geoprocessing
•
Map viewer (ArcGIS online/ Server defaults)
•
Client – side rendering
SVG
•
Canvas
•
Renderers on feature/graphics layers
•
Feature layer Stats Plugin
•
Data Visualization – How?
Service Defaults
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Canvas
•
SVG
•
Renderers
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Feature Layer
A feature layer has its own default symbol
•
Defined in the “drawingInfo” property
•
Renderers
SimpleRenderer - only location information - no field - where?
•
UniqueValueRenderer - what?
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ClassBreaksRenderer - how much?
•
DotDensity
•
BlendRenderer
•
With Expression Function
ScaleDependentRenderer
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Above-Below
• HeatmapRenderer Predominance
TemporalRenderer
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Labeling - LabelLayer
•
No Field – Show Me Where!
SimpleRenderer