topic Re: Basemaps and image type in ArcGIS Online Questions

Basemaps and image type

AgriSpot — Mon, 13 Oct 2014 12:33:07 GMT

Hello guys!

I know that basemaps have a lot of image type formats:

NatGeo_World_Map (MapServer)

Supported Image Format Types: PNG32,PNG24,PNG,JPG,DIB,TIFF,EMF,PS,PDF,GIF,SVG,SVGZ,BMP

In order to improve the loading page time of my application, I want to try different types of image format.

I tried this, but it doesn't work:

http://services.arcgisonline.com/ArcGIS/rest/services/World_Topo_Map/MapServer?f=json&format=SVG

Are those formats available in ArcGIS Online basemaps?

Thanks in advance

Re: Basemaps and image type

RiyasDeen — Mon, 13 Oct 2014 13:39:08 GMT

Hi Agri,

Generally tiled map services are pre created in JPEG format, since they are base maps and don't require transparency JPEG format provided best performance with minimal loss in quality.

If at all you want to test performance for different format, then you may want to check the example usage in this link ArcGIS REST API - Services and Data Types . Format parameter is valid with exportmap operation.

Re: Basemaps and image type

AgriSpot — Mon, 13 Oct 2014 15:45:54 GMT

Thanks a lot, Riyas!

Understood. Some of the tiles are heavy which is very bad for a mobile application. That's why I want to minimize the size of images.

Is it possible to change the compression rate (90% by default)?

Sylvain