# Old Artifacts from previous zoom levels being drawn on the Map

**URL:** <https://community.thinkgeo.com/t/old-artifacts-from-previous-zoom-levels-being-drawn-on-the-map/6827>\
**Category:** Silverlight\
**Created:** [March 3, 2010, 9:21am UTC](https://community.thinkgeo.com/t/old-artifacts-from-previous-zoom-levels-being-drawn-on-the-map/6827 "2010-03-03T09:21:36Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Clint1](https://community.thinkgeo.com/letter_avatar_proxy/v4/letter/c/f6c823/32.png) [@Clint1](https://community.thinkgeo.com/u/Clint1)\
**Post date:** [March 3, 2010, 9:21am UTC](https://community.thinkgeo.com/t/old-artifacts-from-previous-zoom-levels-being-drawn-on-the-map/6827/1 "2010-03-03T09:21:36Z")

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Hi,

I&nbsp;have&nbsp;been&nbsp;working&nbsp;on&nbsp;an&nbsp;application&nbsp;that&nbsp;uses&nbsp;the&nbsp;Silverlight&nbsp;edition&nbsp;that&nbsp;has&nbsp;the&nbsp;following&nbsp;3&nbsp;overlays:

Bing&nbsp;Maps&nbsp;Roads&nbsp;-&nbsp;Base&nbsp;Overlay

Bing&nbsp;Map&nbsp;Aerial&nbsp;-&nbsp;Base&nbsp;Overlay

Field&nbsp;Overlay&nbsp;-&nbsp;This&nbsp;overlay&nbsp;is&nbsp;based&nbsp;upon&nbsp;a&nbsp;shapefile&nbsp;that&nbsp;I&nbsp;have&nbsp;and&nbsp;I&nbsp;have&nbsp;added&nbsp;it&nbsp;to&nbsp;the&nbsp;MultipleSelectedOverlays&nbsp;collection&nbsp;so&nbsp;the&nbsp;user&nbsp;can&nbsp;easily&nbsp;turn&nbsp;it&nbsp;off&nbsp;and&nbsp;on&nbsp;and&nbsp;view&nbsp;it&nbsp;over&nbsp;the&nbsp;Base&nbsp;Overlays&nbsp;above.

Everything&nbsp;is&nbsp;working&nbsp;but&nbsp;when&nbsp;I&nbsp;zoom&nbsp;out&nbsp;and&nbsp;zoom&nbsp;back&nbsp;in&nbsp;I'm&nbsp;getting&nbsp;old&nbsp;artifacts&nbsp;or&nbsp;images&nbsp;being&nbsp;drawn&nbsp;on&nbsp;the&nbsp;map&nbsp;from&nbsp;previous&nbsp;zoom&nbsp;levels.&nbsp;&nbsp;Please&nbsp;see&nbsp;attached&nbsp;image:

 ![](https://community.thinkgeo.com/uploads/default/original/2X/2/2c44ad86156fe8c741cf02e5d45f248c67af5d5e.png)

If&nbsp;I&nbsp;set&nbsp;the&nbsp;IsStrechedEffectDisabled&nbsp;property&nbsp;equal&nbsp;to&nbsp;false&nbsp;then&nbsp;it&nbsp;seems&nbsp;to&nbsp;stop&nbsp;this&nbsp;behavior,&nbsp;so&nbsp;I'm&nbsp;wondering&nbsp;if&nbsp;this&nbsp;is&nbsp;a&nbsp;bug&nbsp;with&nbsp;the&nbsp;stretching.&nbsp;&nbsp;I&nbsp;think&nbsp;the&nbsp;stretching&nbsp;effect&nbsp;can&nbsp;add&nbsp;some&nbsp;value&nbsp;for&nbsp;giving&nbsp;the&nbsp;user&nbsp;the&nbsp;feeling&nbsp;that&nbsp;the&nbsp;application&nbsp;is&nbsp;still&nbsp;responsive&nbsp;while&nbsp;the&nbsp;map&nbsp;is&nbsp;redrawing&nbsp;so&nbsp;I&nbsp;would&nbsp;like&nbsp;to&nbsp;use&nbsp;stretching&nbsp;if&nbsp;possible.&nbsp;&nbsp;

FYI,&nbsp;I'm&nbsp;using&nbsp;the&nbsp;latest&nbsp;Daily&nbsp;build&nbsp;from&nbsp;earlier&nbsp;this&nbsp;week.

Please&nbsp;let&nbsp;me&nbsp;know&nbsp;if&nbsp;this&nbsp;is&nbsp;a&nbsp;bug&nbsp;or&nbsp;what&nbsp;my&nbsp;options&nbsp;are.

Thanks!

&nbsp;

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**Author:** ![Khalil](https://community.thinkgeo.com/letter_avatar_proxy/v4/letter/k/bc8723/32.png) [@Khalil](https://community.thinkgeo.com/u/Khalil)\
**Post date:** [March 4, 2010, 3:10am UTC](https://community.thinkgeo.com/t/old-artifacts-from-previous-zoom-levels-being-drawn-on-the-map/6827/2 "2010-03-04T03:10:48Z")

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Clint,&nbsp;  
  
  
  
Yes,&nbsp;this&nbsp;is&nbsp;a&nbsp;bug&nbsp;for&nbsp;the&nbsp;stretching&nbsp;effect&nbsp;in&nbsp;our&nbsp;SilverlightEdition&nbsp;product.&nbsp;We&nbsp;have&nbsp;fixed&nbsp;it;&nbsp;please&nbsp;check&nbsp;out&nbsp;the&nbsp;latest&nbsp;Daily&nbsp;build&nbsp;from&nbsp;the&nbsp;link&nbsp;below:&nbsp;  
  
helpdesk.thinkgeo.com.&nbsp;And&nbsp;the&nbsp;version&nbsp;is&nbsp;3.1.407.0&nbsp;or&nbsp;later.&nbsp;  
  
  
  
Thanks,&nbsp;  
  
Khalil