Set the map MinimumResolution ?

MarkCollins

In the javascript SDK/API is it possible to set the minimum resolution of the map? We do this in the WPF api to allow users to zoom in beyond the levels of detail specified in the basemap (so users can "zoom in" farther on more detailed feature layers being rendered on top of the basemap).

In WPF we do it like this:

theMap.MinimumResolution = 0.01;

Thanks,

Mark

MorganEverett

You won't be able to see the tiles, but if you add additional lods to the map when you create it you'll be able to zoom in past the basemap tiles.

I was able to do it with this, by adding a few other additional levels of detail, you can add whatever scale and resolution you would like.

var customLods = [];

          

            /*  Custom LODs  */

                var mylods = [{

                  "level": 0,

                  "resolution": 156543.03392800014,

                  "scale": 5.91657527591555E8

                }, {

                  "level": 1,

                  "resolution": 78271.51696399994,

                  "scale": 2.95828763795777E8

                }, {  

                    "level": 2,

                  "resolution": 39135.75848200009,

                  "scale": 1.47914381897889E8

                }, { 

                 "level": 3,

                  "resolution": 19567.87924099992,

                  "scale": 7.3957190948944E7

                }, {  

                    "level": 4,

                  "resolution": 9783.93962049996,

                  "scale": 3.6978595474472E7

                }, {  

                    "level": 5,

                  "resolution": 4891.96981024998,

                  "scale": 1.8489297737236E7

                }, {  

                    "level": 6,

                  "resolution": 2445.98490512499,

                  "scale": 9244648.868618

                }, {  

                    "level": 7,

                  "resolution": 1222.992452562495,

                  "scale": 4622324.434309

                }, {

                    "level": 8,

                  "resolution": 611.4962262813797,

                  "scale": 2311162.217155

                }, { 

                    "level": 9,

                  "resolution": 305.74811314055756,

                  "scale": 1155581.108577

                }, { 

                    "level": 10,

                  "resolution": 152.87405657041106,

                  "scale": 577790.554289

                }, {

                  "level": 11,

                  "resolution": 76.4370282850732,

                  "scale": 288895.277144

                }, {

                  "level": 12,

                  "resolution": 38.2185141425366,

                  "scale": 144447.638572

                }, {

                  "level": 13,

                  "resolution": 19.1092570712683,

                  "scale": 72223.819286

                }, {

                  "level": 14,

                  "resolution": 9.55462853563415,

                  "scale": 36111.909643

                }, {

                  "level": 15,

                  "resolution": 4.77731426794937,

                  "scale": 18055.954822

                }, {

                  "level": 16,

                  "resolution": 2.38865713397468,

                  "scale": 9027.977411

                }, {

                  "level": 17,

                  "resolution": 1.19432856685505,

                  "scale": 4513.988705

                 }, {

                  "level": 18,

                  "resolution": 0.5971642835598172,

                  "scale": 2256.994353

                 }, {

                  "level": 19,

                  "resolution": 0.29858214164761665,

                  "scale": 1128.497176

                 }, {

                  "level": 20,

                  "resolution": 0.15,

                  "scale": 700

                 }, {

                  "level": 21,

                  "resolution": 0.1,

                  "scale": 500

                 }, {

                  "level": 22,

                  "resolution": 0.05,

                  "scale": 250

                }, {

                  "level": 23,

                  "resolution": 0.01,

                  "scale": 100

                }];

     

            map = new Map("mapDiv", {

                basemap: "streets",

                center: [-120.327, 46.38],

                zoom: 10,

                lods: mylods      

            });