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ire_census.js
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ire_census.js
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// Dependencies:
// jQuery
var ire_census = {};
(function() {
function apiRequest(path, callback, handler) {
$.ajax(this.API_URL + path, {
dataType: "jsonp",
jsonpCallback: callback,
success: handler
});
}
this.API_URL = "http://censusdata.ire.org"
this.GEOAPI_URL = "http://census.ire.org/geo/1.0"
this.table_comparator = function (table) {
parts = table.match(/([A-Z]+)(\d+)([A-Z]+)?/);
key = parts[1];
num = parts[2];
if (key[0] == 'P') {
key = "A" + key; // sort P tables first as Census does
}
while (num.length < 3) {
num = '0' + num;
}
key += num;
if (parts[3]) {
key += parts[3];
}
return key;
}
this.build_bulk_data_url = function(state,sumlev,table,format) {
if (!format) {
format = 'csv';
}
if (table) {
table = "." + table;
} else {
table = "";
}
return this.API_URL + "/" + state + "/all_" + sumlev + "_in_"+state+table+"." + format;
}
this.build_shapefile_url = function(state,sumlev) {
for (var i = 0; i < SUMLEVS.length; i++) {
if (SUMLEVS[i][0] == sumlev) {
url_parts = [SUMLEVS[i][2][0],state,SUMLEVS[i][2][1]]
return url_parts.join('');
}
}
throw "Invalid summary level";
}
this.do_with_available_states = function(handler) {
apiRequest("/states.jsonp", "states", handler);
}
this.do_with_labels = function(handler) {
apiRequest("/" + window.DATASET + "_labels.jsonp", "labels_" + window.DATASET, handler);
}
this.do_with_sf1_data = function(geoid, callback) {
var state = geoid.substring(0, 2);
apiRequest("/" + state + "/" + geoid + ".jsonp", "geoid_" + geoid, callback);
}
GEOGRAPHY_TYPES = [
[/^\d{11}$/,'tracts'],
[/^\d{10}$/,'county-subdivisions'],
[/^\d{5}$/,'counties'],
[/^\d{2}$/,'states'],
[/^\d{7}$/,'places']
];
// do_with_geoid: for a string representing a single location, fetch the JSON data (including GeoJSON)
// from GEOAPI_URL and pass it to success_handler.
// For now, if geoid begins with a slash, it will be treated as a complete type/geoid combo. This
// leaves it fairly flexible to add more geographies in case sometimes lengths aren't distinctive.
// But also for now, we can infer the geography type by the length of the geoID, so the value for
// geoid may also simply be a string of 2-11 digits, or technically any pattern defined in GEOGRAPHY_TYPES.
//
// See http://census.ire.org/docs/boundary.html for more on the API, or to see what data
// gets returned, look at http://census.ire.org/geo/1.0/boundary-set/places/1714000
// TK: examples demonstrating how to put the shape which is returned on a map.
this.do_with_geoid = function (geoid,success_handler) {
if (geoid[0] != '/') {
var matched = false;
for (var i=0; i < GEOGRAPHY_TYPES.length; i++) {
if (geoid.match(GEOGRAPHY_TYPES[i][0])) {
geoid = "/" + GEOGRAPHY_TYPES[i][1] + "/" + geoid;
matched = true;
break;
}
}
if (!matched) {
throw "Geoid does not match any known types. Check the length."
}
}
if (geoid.substr(0,'/boundary-set'.length) != '/boundary-set') {
geoid = '/boundary-set' + geoid;
}
$.ajax(this.GEOAPI_URL + geoid, {
dataType: "jsonp",
success: success_handler
});
}
// given a point as [lat,lng] or as "lat,lng", call the contains function at GEOAPI_URL and pass the results
// to success_handler. not rigged to handle paginated results, but for foreseeable future,
// the contains query won't return enough for that to matter.
this.do_with_contains_results = function(point,success_handler,options) {
if ($.isArray(point)) {
point = point.join(',');
}
var url = '/boundary/?contains=' + point;
if (options && options.sets) {
if ($.isArray(options.sets)) {
url += "&sets=" + options.sets.join(',');
} else {
url += "&sets=" + options.sets;
}
}
// 38.948337,-92.328032&sets=tracts,counties
$.ajax(this.GEOAPI_URL + url, {
dataType: "jsonp",
success: success_handler
});
}
this.STATE_FIPS = {
"Alabama": "01",
"Alaska": "02",
"Arizona": "04",
"Arkansas": "05",
"California": "06",
"Colorado": "08",
"Connecticut": "09",
"Delaware": "10",
"District of Columbia": "11",
"Florida": "12",
"Georgia": "13",
"Hawaii": "15",
"Idaho": "16",
"Illinois": "17",
"Indiana": "18",
"Iowa": "19",
"Kansas": "20",
"Kentucky": "21",
"Louisiana": "22",
"Maine": "23",
"Maryland": "24",
"Massachusetts": "25",
"Michigan": "26",
"Minnesota": "27",
"Mississippi": "28",
"Missouri": "29",
"Montana": "30",
"Nebraska": "31",
"Nevada": "32",
"New Hampshire": "33",
"New Jersey": "34",
"New Mexico": "35",
"New York": "36",
"North Carolina": "37",
"North Dakota": "38",
"Ohio": "39",
"Oklahoma": "40",
"Oregon": "41",
"Pennsylvania": "42",
"Puerto Rico": "72",
"Rhode Island": "44",
"South Carolina": "45",
"South Dakota": "46",
"Tennessee": "47",
"Texas": "48",
"Utah": "49",
"Vermont": "50",
"Virginia": "51",
"Washington": "53",
"West Virginia": "54",
"Wisconsin": "55",
"Wyoming": "56"
}
this.get_state_fips = function(state) {
return this.STATE_FIPS[state];
}
this.FIPS_STATE = {}
for (name in this.STATE_FIPS) {
var fips = this.get_state_fips(name);
this.FIPS_STATE[fips] = name;
}
this.get_fips_state = function(fips) {
return this.FIPS_STATE[fips];
}
SUMLEVS = [
// tuples: (code, name, shapefile_template)
['040','State', ["http://www2.census.gov/geo/tiger/TIGER2010/STATE/2010/tl_2010_","_state10.zip"]],
['050','County', ["http://www2.census.gov/geo/tiger/TIGER2010/COUNTY/2010/tl_2010_","_county10.zip"]],
['060','County Subdivision', ["http://www2.census.gov/geo/tiger/TIGER2010/COUSUB/2010/tl_2010_","_cousub10.zip"]],
['140','Census Tract', ["http://www2.census.gov/geo/tiger/TIGER2010/TRACT/2010/tl_2010_","_tract10.zip"]],
['160','Place', ["http://www2.census.gov/geo/tiger/TIGER2010/PLACE/2010/tl_2010_","_place10.zip"]]
]
}).apply(ire_census);