Reference Info

Round(AreaGeodetic($feature, 'hectares'), 3)

GeometryService geometryService = new GeometryService("...esri/GeometryServer");

geometryService.ProjectCompleted += geometryService_ProjectCompeted;

GraphicsLayer graphicsLayer = MainMap.Layers["MyGraphicsLayer"] as GraphicsLayer;

geometryService.ProjectAsync(graphicsLayer.Graphics.ToList(), new SpatialReference(102100));

In the geometryService_ProjectCompleted(...) function you can pull out the Geometry of the object(s) and that object(s) will contain coordinates in 102100, which is the base map.

1. A direction field is needed (values 0-360). 

2. Change symbology to an arrow.

3. Layer Properties --> Symbology --> Symbol (Advanced --> Rotation). 

4. Drop-down to select the field. Select Geographic radio-button.

1. Class: if ($feature.Contour % 10 == 0) { return $feature.Contour;}

2. Position

   1. Placement: Contour placement

      1. Uphill label alignment

"S" + $feature["ID"] + "-" + $feature["Flag"] + $feature["Modifier"] + TextFormatting.NewLine + $feature["OHWM"] + "'" + TextFormatting.NewLine + $feature["Notes"]

IIf($feature["Linear"] == "Yes", "L", NULL) + "W" + $feature["ID"] + "-" + $feature["Flag"] + TextFormatting.NewLine + $feature["Notes"]

"DF" + $feature["ID'} + TextFormatting.NewLine + $feature["Notes"]

$feature["Obstruction"]

DomainName($feature, "Obstruction") + TextFormatting.NewLine + $feature["Notes"]

"OW " + $feature["ID"] + "-" + $feature["Flag"] + TextFormatting.NewLine + $featrue["Notes"]

In general, as the Zoom level gets smaller, the view is larger. A zoom level of 0 would be a view of the entire world; while a zoom level of 23 would be a house property. Esri features two different zoom level scales: one for image tile layers and one for vector tile layers. Esri also has an API for Mapbox that uses a third scale.

Image Tile Layer Scale

• Zoom level: 0

  • Scale: | 1 : 591657527

  • Example: World

• Zoom level: 1

  • Scale | 1 :  295828763

  • Example: World

• Zoom level: 2

  • Scale | 1 :  147914381

  • Example: World

• Zoom level: 3

  • Scale | 1 :  73957190

  • Example: Continent

• Zoom level: 4

  • Scale | 1 :  36978595

  • Example: Continent

• Zoom level: 5

  • Scale | 1 :  18489297

  • Example: Countries

• Zoom level: 6

  • Scale | 1 :  9244648

  • Example: Country

• Zoom level: 7 

  • Scale | 1 :   4622324

  • Example: States/Provinces

• Zoom level: 8

  • Scale | 1 :  2311162

  • Example: Counties

• Zoom level: 9

  • Scale | 1 :  1155581

  • Example: Counties

• Zoom level: 10

  • Scale | 1 :  577790

  • Example: County

• Zoom level: 11

  • Scale | 1 :  288895

  • Example: Metropolitan Area

• Zoom level: 12

  • Scale | 1 :  144447

  • Example: Cities

• Zoom level: 13

  • Scale | 1 :  72223

  • Example: City

• Zoom level: 14

  • Scale | 1 :  36111

  • Example: Town

• Zoom level: 15

  • Scale | 1 :  18055

  • Example: Neighborhood

• Zoom level: 16

  • Scale | 1 :  9027

  • Example: Streets

• Zoom level: 17

  • Scale | 1 :  4513

  • Example: City block

• Zoom level: 18

  • Scale | 1 :  2256

  • Example: Buildings

• Zoom level: 19

  • Scale | 1 :  1128

  • Example: Building

• Zoom level: 20

  • Scale | 1 :  564

  • Example: Houses

• Zoom level: 21

  • Scale | 1 :  282

  • Example: Houses

• Zoom level: 22

  • Scale | 1 :  141

  • Example: Houses

• Zoom level: 23

  • Scale | 1 :  70

  • Example: House property

Vector Tile Layer Scale

• Zoom level: 0

• Zoom level: 1

• Zoom level: 2

• Zoom level: 3

• Zoom level: 4

• Zoom level: 5

• Zoom level: 6

• Zoom level: 7 

• Zoom level: 8

• Zoom level: 9

• Zoom level: 10

• Zoom level: 11

• Zoom level: 12

• Zoom level: 13

• Zoom level: 14

• Zoom level: 15

• Zoom level: 16

• Zoom level: 17

• Zoom level: 18

• Zoom level: 19

• Zoom level: 20

• Zoom level: 21

• Zoom level: 22

• Zoom level: 23