topic Re: how to calculate export map time (timeinstant) in ArcGIS API for Silverlight Questions

how to calculate export map time (timeinstant)

JimHenry — Wed, 22 Dec 2010 17:35:16 GMT

I have a time slider and a dynamic map layer with time enabled.

I am trying to export a still image ... the only method I found is to call the web service sending the parameters.
http://help.arcgis.com/en/arcgisserver/10.0/apis/rest/export.html

Problem is I can not seem to figure out how to convert/get the timeinstant value from the time slider.

Re: how to calculate export map time (timeinstant)

DominiqueBroux — Sat, 11 Dec 2021 16:48:35 GMT

If you set the TimeExtent property of your map, the request to the rest end point will be made by the framework behind the scene. That's the easier way.

If for any reason you need to request yourself the rest end point. the timeinstant is the number of milliseconds since 1970 January, the 1st.

So to convert a time to timeinstant, you can use code like:

TimeSpan elapsed = timeToConvert.ToUniversalTime() - new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);long timeinstant = elapsed.TotalMilliseconds;

Re: how to calculate export map time (timeinstant)

JimHenry — Mon, 27 Dec 2010 17:15:14 GMT

Thanks for the reply!

Do you know of another way (esri control) that I can automate an export (snap shot) of what is displayed on the webmap? I would like to avoid meshing the images together on the back end in order to create the same image.

Re: how to calculate export map time (timeinstant)

JimHenry — Mon, 27 Dec 2010 19:46:29 GMT

This is sort of what I am looking to do:
http://resources.arcgis.com/gallery/file/net-web-adf/details?entryID=5EC9123A-1422-2418-A090-7B52916462E6

Since I only want a png/bmp/gif/ect I was hoping for a simpler method

Re: how to calculate export map time (timeinstant)

JimHenry — Tue, 04 Jan 2011 11:23:51 GMT

I found this thread:
http://forums.esri.com/Thread.asp?c=158&f=2455&t=281577

Gave an example of a service that saved out an image using ImageTools (http://imagetools.codeplex.com).
http://acequia.ccrfcd.org/fvadvanced/fvadvanced.aspx

Since I would prefer not to rely on third party tools I am thinking about using the ExportToMap for each layer then combining on the back end with another process using imagemagic or something similar.