{ "layers" : [ { "currentVersion" : 12, "id" : 1, "name" : "ChicagoBusAccess_SpatialJoin", "type" : "Feature Layer", "serviceItemId" : "82b095a0138d4fbfb6d8d11df156e68c", "cacheMaxAge" : 30, "displayField" : "BLOCK_GROUP", "description" : "\u003cDIV STYLE=\"text-align:Left;\"\u003e\u003cDIV\u003e\u003cDIV\u003e\u003cP STYLE=\"margin:0 0 0 0;\"\u003e\u003cSPAN\u003e\u003cSPAN\u003eWeighting & Summarizing process:\u003c/SPAN\u003e\u003c/SPAN\u003e\u003c/P\u003e\u003cP STYLE=\"margin:0 0 0 0;\"\u003e\u003cSPAN\u003eDefault weight for each bus stop set to 1.\u003c/SPAN\u003e\u003c/P\u003e\u003cUL STYLE=\"margin:0 0 0 0;padding:0 0 0 0;\"\u003e\u003cLI\u003e\u003cP STYLE=\"margin:0 0 0 0;\"\u003e\u003cSPAN\u003e\u003cSPAN\u003eFour stops with no routes associated were weighted at 0.\u003c/SPAN\u003e\u003c/SPAN\u003e\u003c/P\u003e\u003c/LI\u003e\u003cLI\u003e\u003cP STYLE=\"margin:0 0 0 0;\"\u003e\u003cSPAN\u003eBus stops serving \u003c/SPAN\u003e\u003cA href=\"https://www.transitchicago.com:443/assets/1/6/Chicago_Transit_Authority_Service_Standards.pdf\" STYLE=\"text-decoration:underline;\"\u003e\u003cSPAN\u003ekey routes\u003c/SPAN\u003e\u003c/A\u003e\u003cSPAN\u003e were assigned a weight of 1.5. 54% of the 10,760 stops met this criteria.\u003c/SPAN\u003e\u003c/P\u003e\u003c/LI\u003e\u003cLI\u003e\u003cP STYLE=\"margin:0 0 0 0;\"\u003e\u003cSPAN\u003eWeights were summed within a block group. For example, a BG with one non-key stop and two key stops would get a weight of 1 + 1.5 + 1.5 = 4.\u003c/SPAN\u003e\u003c/P\u003e\u003c/LI\u003e\u003cLI\u003e\u003cP STYLE=\"margin:0 0 0 0;\"\u003e\u003cSPAN\u003eDivide by square miles and symbolize by quantile such that the low-density BG’s are lighter and high-density are darker. 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