Geographic Information Systems Stack Exchange is a question and answer site for cartographers, geographers and GIS professionals. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I have an application that uses a cached world basemap overlaid with more local and specific data coming from a dynamic map service. It works well for performance, but some users need to see some very detailed information in the dynamic map service.

Is there a technique to allow users to zoom in past the closest scale range of the cached service?

share|improve this question
up vote 1 down vote accepted

You can add additional levels of detail (lod's) to the configuration, which will allow you to zoom 'beyond' the available levels of the cached base map. From the Flex Viewer help - look for the tag in the 'Map content' section toward the bottom of the page :

Here is a sample from a modified Flex Viewer:

        <!--Custom levels specified to get 'below' the Esri basemaps-->
        <lod resolution="76.4370282850732" scale="288895.277144"/><!-- 11 -->
        <lod resolution="38.2185141425366" scale="144447.638572"/><!-- 12 -->
        <lod resolution="19.1092570712683" scale="72223.819286"/><!-- 13 -->
        <lod resolution="9.55462853563415" scale="36111.909643"/><!-- 14 -->
        <lod resolution="4.77731426794937" scale="18055.954822"/><!-- 15 -->
        <lod resolution="2.38865713397468" scale="9027.977411"/><!-- 16 -->
        <lod resolution="1.19432856685505" scale="4513.988705"/><!-- 17 -->
        <lod resolution="0.597164283559817" scale="2256.994353"/><!-- 18 -->
        <lod resolution="0.298582141647617" scale="1128.497176"/><!-- 19 -->
        <lod resolution="0.1492910708238085" scale="564.248588"/><!-- Custom1 -->
        <lod resolution="0.0746455354119043" scale="282.124294"/><!-- Custom2 -->
        <lod resolution="0.0373227677059522" scale="141.062147"/><!-- Custom3 -->
share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.