dev summit recap

2018devsummit.md

devsummit 2018

• maturaty dev summit. not many ground breaking features. more polish
• Machine learning and AI were big this year with the keynote being from microsoft and the introduction of a geovm in azure that can be provisioned.
• Some cool demo's on training models to understand data and then letting them predict the future or act on other data was pretty cool.
• https://jfkfiles2.azurewebsites.net/
• utah roads/crash data was used in the keynote

Geocoding

• 10.6 has a new geocoding engine but users can't create them until pro 2.2. around UC

JSAPI

• Webpack successfully creates bundles in 4.x js api and the lessons learned should be applied to 3.x at some point hopefully
• New pro projection engine was transpiled into web assembly and is shipped with the js api. no more need for proj4
• command line interface tool for creating js api apps inspired by the dojo cli and ember cli

Resources

• Widget Generator: https://github.com/Esri/generator-esri-appbuilder-js
• Build Tool: https://github.com/gbochenek/esri-wab-build
• Unit Testing Example: https://github.com/gbochenek/wab-test-example

Finding Great Widgets

• Geonet: Web AppBuilder Custom Widgets Group
• WAB Widget Search
• ArcScripts Search

Documentation, Download, and Support:

• http://developcrs.arcgis.com/web-appbuilder
• http://developers.arcgis.com/javascript

Server

• new enterprise SDK for arcobjects - means same code but new assemblies. access to new pro apis.
• vector tile local query is coming or you can assign an operational url to a vector tile set that will be used to query
• https://github.com/Esri/arcgis-powershell-dsc - chef competition

Analytics Telemetry as used in arcgis online/open data

• Create workflows to guide people to do things. For instance, create/save a web map.
• They assigned dollar amounts to certain work flows to fit into the GA system
• For us this could be downloading data

Geoevent

• Scales linearly horizontally. 6k ops/second per machine
• Filtering and such can double ops per second so be careful on the input model
• http://links.esri.com/geoevent-multiplemachine

Pro

Release Timeline 2018

Q1

• Pro 2.1
• Pro 2.1.1
• Pro 2.1.2

Q2

• Pro 2.2
• ArcMap 10.6.1

Q3

• Pro 2.2.1

Q4

• Pro 2.3

Editing

• Start edits can be named for the undo stack

• You can create chained edit operations for handling multiple events

• The feature service and direct to base editing model is different from versioned data. When you mix these undo can act funny

• https://github.com/Esri/arcade-expressions - repo of user defined arcade expressions

Architecture

• View models should be private and observable collections should be exposed
• Pro uses a state snapshot, since everything is "async" Pro has a task scheduler that orders everything

Perf

• Sync methods should be used when called in tight loops or high frequency because of async thread orchestration cost
• Async will perform better if used infrequently or one off
• Binding operations, to a list etc, should contain a lock to render and notify of it's change

Profiler

• left-ctrl+left-alt+m brings up a mini profiler to see whats going on within pro with events etc.

New stuff

• Reports: A new data type that you can create and populate from data. It can also be published to server.
• If we have any examples we can share them with esri to show what types of things we normally do
• geojson will be a supported type in pro

Projection Transformations

• Transformations have a bounding box of usability stored in the EPSG db
• The transformations displayed in pro are chosen by intersecting the envelope of features and the envelope of transformations
• Ties are broken by the accuracy of the transformation
• Bottom line, we should use the top transformation specified