# Difference between the background and the dynamic layer **URL:** \ **Category:** WinForms\ **Created:** [March 30, 2010, 3:19am UTC](https://community.thinkgeo.com/t/difference-between-the-background-and-the-dynamic-layer/1124 "2010-03-30T03:19:57Z")\ **Posts on this page:** 11\ **Page:** 1
**Author:** ![Pierre-Antoine](https://community.thinkgeo.com/user_avatar/community.thinkgeo.com/pierre-antoine/32/24983_2.png) [@Pierre-Antoine](https://community.thinkgeo.com/u/Pierre-Antoine)\ **Post date:** [March 30, 2010, 3:19am UTC](https://community.thinkgeo.com/t/difference-between-the-background-and-the-dynamic-layer/1124/1 "2010-03-30T03:19:57Z")
Hello, I have a difference between the background and the dynamic layer. My background is a VirtualEarthLayer and I use InMemoryFeatureLayer for the dynamic layer. When I draw some features and I try to navigate or zoom in the map, the features didn't move in the same way. It's like there is 2 different projection for the layers. I use the same configuration in a prototype and I don't have this problem. Do you have any ideas ? Thanks. ---
**Author:** ![Pierre-Antoine](https://community.thinkgeo.com/user_avatar/community.thinkgeo.com/pierre-antoine/32/24983_2.png) [@Pierre-Antoine](https://community.thinkgeo.com/u/Pierre-Antoine)\ **Post date:** [March 30, 2010, 7:43am UTC](https://community.thinkgeo.com/t/difference-between-the-background-and-the-dynamic-layer/1124/2 "2010-03-30T07:43:08Z")
I have another clue about my problem. This comes from VirtualEarth. When I put my  mouse on a recognizable item (eg a tree) and I will move the map,  when I release the button of my mouse, this item is no longer aligned  with the mouse. ---
**Author:** ![ThinkGeo](https://community.thinkgeo.com/user_avatar/community.thinkgeo.com/thinkgeo/32/25029_2.png) [@ThinkGeo](https://community.thinkgeo.com/u/ThinkGeo)\ **Post date:** [March 31, 2010, 2:41am UTC](https://community.thinkgeo.com/t/difference-between-the-background-and-the-dynamic-layer/1124/3 "2010-03-31T02:41:09Z")
Pierre-Antoine,      If I am not misunderstanding anything, I think your problem may lies in the data for your InmemoryFeatureLayer is not in the same projection with VE which is 900913.      Any more discussion would be appricated.      Thanks.      Yale  ---
**Author:** ![Pierre-Antoine](https://community.thinkgeo.com/user_avatar/community.thinkgeo.com/pierre-antoine/32/24983_2.png) [@Pierre-Antoine](https://community.thinkgeo.com/u/Pierre-Antoine)\ **Post date:** [March 31, 2010, 3:48am UTC](https://community.thinkgeo.com/t/difference-between-the-background-and-the-dynamic-layer/1124/4 "2010-03-31T03:48:30Z")
Hello Yale, Thanks for your answer but I've already think about that and it's not this problem.  I have the same problem when I've only the VirtualEarth layer. ---
**Author:** ![ThinkGeo](https://community.thinkgeo.com/user_avatar/community.thinkgeo.com/thinkgeo/32/25029_2.png) [@ThinkGeo](https://community.thinkgeo.com/u/ThinkGeo)\ **Post date:** [March 31, 2010, 8:00pm UTC](https://community.thinkgeo.com/t/difference-between-the-background-and-the-dynamic-layer/1124/5 "2010-03-31T20:00:36Z")
Pierre-Antoine,  Thanks for your reply and let me know your status, which will save me quite a time to think about itJ. Thanks.   Yale ---
**Author:** ![Pierre-Antoine](https://community.thinkgeo.com/user_avatar/community.thinkgeo.com/pierre-antoine/32/24983_2.png) [@Pierre-Antoine](https://community.thinkgeo.com/u/Pierre-Antoine)\ **Post date:** [April 1, 2010, 3:16am UTC](https://community.thinkgeo.com/t/difference-between-the-background-and-the-dynamic-layer/1124/6 "2010-04-01T03:16:33Z")
Hello Yale, To be clear, I've got the same problem as this post : [gis.thinkgeo.com/tabid/143/aff/12/a...fault.aspx](http://gis.thinkgeo.com/tabid/143/aff/12/afv/topic/aft/5620/Default.aspx) This post raises some problem on the web version but I'm on the desktop version. ---
**Author:** ![Pierre-Antoine](https://community.thinkgeo.com/user_avatar/community.thinkgeo.com/pierre-antoine/32/24983_2.png) [@Pierre-Antoine](https://community.thinkgeo.com/u/Pierre-Antoine)\ **Post date:** [April 1, 2010, 9:42am UTC](https://community.thinkgeo.com/t/difference-between-the-background-and-the-dynamic-layer/1124/7 "2010-04-01T09:42:15Z")
FYI : I take a look on my prototype and I have a shift too. A little one but it's here.   I draw this feature : ![](https://community.thinkgeo.com/uploads/default/original/2X/0/0a65eeb71b03a7dc3550b14deae465e329b4f78d.jpg)   When I zoom on it : ![](https://community.thinkgeo.com/uploads/default/original/2X/3/3d79109c9b078679a377049e6f5bda88f5ee7681.jpg) I have to zoom once again to have the good match.   When I pan the map : ![](https://community.thinkgeo.com/uploads/default/original/2X/1/183e9f5c4a8e755932886572540c5b4b50e236d2.jpg) ---
**Author:** ![ThinkGeo](https://community.thinkgeo.com/user_avatar/community.thinkgeo.com/thinkgeo/32/25029_2.png) [@ThinkGeo](https://community.thinkgeo.com/u/ThinkGeo)\ **Post date:** [April 1, 2010, 9:27pm UTC](https://community.thinkgeo.com/t/difference-between-the-background-and-the-dynamic-layer/1124/8 "2010-04-01T21:27:07Z")
[Pierre-Antoine](http://gis.thinkgeo.com/Support/DiscussionForums/tabid/143/afv/profile/uid/32302/Default.aspx), I am sorry to say that I could not recreate your problem. I tested by change the HowDoI sample TrackAndEditShape sample; the following code is its loading code with accound and password needed.   winformsMap1.MapUnit = GeographyUnit.Meter; winformsMap1.BackgroundOverlay.BackgroundBrush = new GeoSolidBrush(GeoColor.GeographicColors.ShallowOcean); `string accountId = " ****";string password = "****";string clientIpAddress = "66.249.71.109";string cacheDirectory = @"c:\temp\";VirtualEarthLayer velayer = new VirtualEarthLayer(accountId, password, clientIpAddress, cacheDirectory);velayer.MapType = VirtualEarthMapType.AerialWithLabels; LayerOverlay layerOverlay = new LayerOverlay();layerOverlay.Layers.Add(velayer); winformsMap1.Overlays.Add(layerOverlay); winformsMap1.CurrentExtent = new RectangleShape(-143.4, 109.3, 116.7, -76.3);winformsMap1.Refresh();`     Following is three screenshot with zoomin and zoomout.   So, in your case, just make sure 2 things: 1)      Did you turn off the ZoomLevelSnappingMode from default to none? 2)      How did you generate your inmemoryLayer data, I means the polygon in your screenshot? I did by track a shape along some building, in this way, the tracked out polygon should be in the same projection with the VE. I am not sure your data source from, so I cannot make sure about this point.   If you still have problem it would be nice and helpful if you could make a small sample application for me.   Thanks.   Yale ---
**Author:** ![ThinkGeo](https://community.thinkgeo.com/user_avatar/community.thinkgeo.com/thinkgeo/32/25029_2.png) [@ThinkGeo](https://community.thinkgeo.com/u/ThinkGeo)\ **Post date:** [April 1, 2010, 9:34pm UTC](https://community.thinkgeo.com/t/difference-between-the-background-and-the-dynamic-layer/1124/9 "2010-04-01T21:34:38Z")
[Pierre-Antoine](http://gis.thinkgeo.com/Support/DiscussionForums/tabid/143/afv/profile/uid/32302/Default.aspx), Sorry for missing the screenshots, see following attachments.   ![](https://community.thinkgeo.com/uploads/default/original/2X/0/08baac3454c05b485a8c4db5708b28ea46fc6886.png) ![](https://community.thinkgeo.com/uploads/default/original/2X/e/e53b0276ab24278d49dc2388b11241d0a704c066.png) ![](https://community.thinkgeo.com/uploads/default/original/2X/0/0ac69462d67fc5b293b290cf15137c5bb1c5fce8.png)   Thanks.   Yale ---
**Author:** ![Pierre-Antoine](https://community.thinkgeo.com/user_avatar/community.thinkgeo.com/pierre-antoine/32/24983_2.png) [@Pierre-Antoine](https://community.thinkgeo.com/u/Pierre-Antoine)\ **Post date:** [April 2, 2010, 2:48am UTC](https://community.thinkgeo.com/t/difference-between-the-background-and-the-dynamic-layer/1124/10 "2010-04-02T02:48:28Z")
`` `1)      Did you turn off the ZoomLevelSnappingMode from default to none?` ` ` Yes `` `2)      How did you generate your inmemoryLayer data, I means the polygon in your screenshot? I did by track a shape along some building, in this way, the tracked out polygon should be in the same projection with the VE. I am not sure your data source from, so I cannot make sure about this point.` ` `   The polygon was created by tracking a shape in the trackshapelayer. ---
**Author:** ![ThinkGeo](https://community.thinkgeo.com/user_avatar/community.thinkgeo.com/thinkgeo/32/25029_2.png) [@ThinkGeo](https://community.thinkgeo.com/u/ThinkGeo)\ **Post date:** [April 5, 2010, 8:21pm UTC](https://community.thinkgeo.com/t/difference-between-the-background-and-the-dynamic-layer/1124/11 "2010-04-05T20:21:32Z")
Pierre-Antoine, Thanks for your reply.   I think the problem is probably that you turn off the ZoomLevelSnapping Mode . I think up to now the VirtualEarthLayer (or Overlay) and the GoogleLayer( or GoogleOverlay) cannot support  those non-preset zoomlevels. The reason is that these images retrieved from Google server or VE server is just tiled images, it did not support non-preset scales image fetching.   Any more questions just feel free to let me know.   Thanks.   Yale