ArcGISDynamicMapServiceLayer showing white pixels as transparent even though black pixels are supposed to be background

IsaacBoates — Mon, 29 May 2017 16:11:37 GMT

We are visualizing a tiff image in our web map. We have set the layer properties to say that black pixels are to be treated as background, and that they should be displayed as transparent. Visualizing it in ArcGIS Desktop confirms that this is working properly. However, as soon as the layer is published and the layer is put into a ArcGISDynamicMapServiceLayer, the white pixels seem to become transparent. We cannot seem to identify the cause of this problem.

This is the code (SETTLE_VP_ORTHOPHOTO is a variable storing the rest endpoint for the layer.):

var VP_ortho = new ArcGISDynamicMapServiceLayer(SETTLE_VP_ORTHOPHOTO ,{
id: "VP_ortho",
visible: false
});

This is the service layer definition:

Layer: mos_VP_2.tif (ID: 0)

Name: mos_VP_2.tif

Display Field:

Type: Raster Layer

Geometry Type: null

Description:

Definition Expression: N/A

Copyright Text:

Default Visibility: true

MaxRecordCount: 0

Supported Query Formats: JSON, AMF, geoJSON

Min Scale: 0

Max Scale: 0

Supports Advanced Queries: false

Supports Statistics: false

Has Labels: false

Can Modify Layer: false

Can Scale Symbols: false

Use Standardized Queries: true

Extent:

XMin: 2065234.8595104713

YMin: 6195018.263458403

XMax: 2068324.6069604708

YMax: 6199050.734858402

Spatial Reference: 102100 (3857)

Drawing Info:

N/AAdvanced Query Capabilities:

Supports Statistics: false

Supports OrderBy: false

Supports Distinct: false

Supports Pagination: false

Supports TrueCurve: false

Supports Returning Query Extent: true

Supports Query With Distance: true

Supports Sql Expression: false

HasZ: false

HasM: false

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeNone

Type ID Field: null

Fields: None

topic ArcGISDynamicMapServiceLayer showing white pixels as transparent even though black pixels are supposed to be background in ArcGIS JavaScript Maps SDK Questions

ArcGISDynamicMapServiceLayer showing white pixels as transparent even though black pixels are supposed to be background

Layer: mos_VP_2.tif (ID: 0)