Лучший подход к получению состояний с эффектом детализации => избирательные округа

В настоящее время у меня есть карта, на которой показаны полигоны штатов США. Я хотел бы, чтобы пользователь дважды щелкнул штат, а затем увеличил масштаб штата и показал многоугольники округа Конгресса (CD).

У меня есть отдельные карты, которые отлично работают с использованием kml. Я не уверен, какой лучший подход для детализации от состояния до компакт-диска. Хитрость заключается в том, что мне нужно имя/код штата, так как теперь я могу сгенерировать KML на уровне компакт-диска.

Я использую Google Maps API v3.


google-maps google-maps-api-3
person user448157    schedule 21.09.2010    source источник

Ответы (2)


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Может быть, я ошибаюсь, но вы хотите иметь возможность дважды щелкнуть точку на карте и узнать, в каком состоянии щелкнули? Затем увеличить масштаб до этого состояния и отобразить карту CD?

Если это так, выполните обратное геокодирование. в Картах Google по событию двойного щелчка. Из полученных географических данных вы извлекаете состояние (последние данные в массиве результатов).

Пример ответа из документации Google:

results[0].formatted_address: "275-291 Bedford Ave, Brooklyn, NY 11211, USA",
results[1].formatted_address: "Williamsburg, NY, USA",
results[2].formatted_address: "New York 11211, USA",
results[3].formatted_address: "Kings, New York, USA",
results[4].formatted_address: "Brooklyn, New York, USA",
results[5].formatted_address: "New York, New York, USA",
results[6].formatted_address: "New York, USA", // The state information
results[7].formatted_address: "United States"

Если затем вы захотите масштабировать до предопределенного экстента карты штата, вы можете либо определить свой собственный, либо использовать стандартное геокодирование, чтобы найти координаты для штата.

person Niklas Wulff    schedule 03.03.2011
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Спасибо за ответ - я думаю, что другая сторона проблемы будет заключаться в том, как выяснить, на каком компакт-диске вы находитесь, поскольку обратное геокодирование не имеет возможности сделать это. А также как правильно загрузить оверлей CD. - person Wyatt Barnett; 04.03.2011
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Интересно, поможет ли этот веб-сайт в этом: govtrack.us/embed/googlemaps.xpd< /а> - person iwalkbarefoot; 05.03.2011

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Вот изображение:

Карта США

А вот и источник:

<img class="map" src="/images/map_us_outline.png" width="550" height="375" usemap="#usa">
<map name="usa">
<area
href="/state.php?state=Washington" title="WA" shape="poly" coords="27,3,27,13,27,28,26,34,33,35,34,42,56,47,77,50,88,49,96,12,48,1,49,12,41,10" />
<area shape="poly" coords="26,32,22,45,13,65,8,73,7,84,28,90,64,100,75,102,83,77,83,68,90,56,88,52,77,49,51,46,36,43,33,35"
href="/state.php?state=Oregon"
alt="Oregon" title="Oregon" />
<area shape="poly" coords="8,85,6,93,2,102,1,111,2,120,3,129,8,143,9,154,10,166,17,186,27,196,44,212,48,222,73,227,76,220,82,210,82,202,74,186,38,134,47,97"
href="/state.php?state=California"
alt="California" title="California"   />
<area shape="poly" coords="96,13,88,50,91,57,82,68,82,76,75,101,133,113,137,79,126,78,118,71,115,61,110,62,111,57,113,50,103,29,104,15"
href="/state.php?state=Idaho"
alt="Idaho" title="Idaho"   />
<area shape="poly" coords="48,97,38,134,81,201,81,188,83,182,89,182,105,109"
href="/state.php?state=Nevada"
alt="Nevada" title="Nevada"   />
<area shape="poly" coords="105,109,93,172,142,182,149,128,129,125,133,113"
href="/state.php?state=Utah"
alt="Utah" title="Utah"   />
<area shape="poly" coords="92,174,88,185,84,183,80,196,84,208,76,218,76,226,72,230,111,253,133,257,143,182"
href="/state.php?state=Arizona"
alt="Arizona" title="Arizona"   />
<area shape="poly" coords="104,16,104,34,113,49,109,61,115,62,118,73,131,78,139,75,204,82,208,30"
href="/state.php?state=Montana"
alt="Montana" title="Montana"   />
<area shape="poly" coords="140,75,132,125,198,134,204,83"
href="/state.php?state=Wyoming"
alt="Wyoming" title="Wyoming"   />
<area shape="poly" coords="151,130,143,180,216,188,220,136"
href="/state.php?state=Colorado"
alt="Colorado" title="Colorado"   />
<area shape="poly" coords="145,182,133,255,142,257,144,250,161,252,163,250,199,253,206,189"
href="/state.php?state=New Mexico"
alt="New Mexico" title="New Mexico"   />
<area shape="poly" coords="208,30,206,68,274,72,267,32"
href="/state.php?state=North Dakota"
alt="North Dakota" title="North Dakota"   />
<area shape="poly" coords="206,69,203,109,254,111,265,115,274,119,276,82,271,78,272,72"
href="/state.php?state=South Dakota"
alt="South Dakota" title="South Dakota"   />
<area shape="poly" coords="202,109,200,134,218,138,219,150,287,152,282,143,274,117,265,114,259,113,250,110"
href="/state.php?state=Nebraska"
alt="Nebraska" title="Nebraska"   />
<area shape="poly" coords="220,149,217,189,294,191,293,161,289,157,288,152,282,150"
href="/state.php?state=Kansas"
alt="Kansas" title="Kansas"   />
<area shape="poly" coords="206,189,206,195,236,197,237,223,257,231,277,235,288,234,297,236,294,192,290,191"
href="/state.php?state=Oklahoma"
alt="Oklahoma" title="Oklahoma"   />
<area shape="poly" coords="206,195,200,253,162,251,165,258,178,273,182,282,197,293,203,283,221,289,237,314,246,330,265,335,263,319,275,302,304,287,306,267,301,246,300,236,289,232,265,231,244,225,238,222,236,197"
href="/state.php?state=Texas"
alt="Texas" title="Texas"   />
<area shape="poly" coords="269,33,274,70,272,77,275,84,276,107,324,103,324,96,313,88,308,79,310,70,318,56,336,44,323,41,311,38,296,36,290,29,285,30"
href="/state.php?state=Minnesota"
alt="Minnesota" title="Minnesota"   />
<area shape="poly" coords="274,105,274,116,282,142,326,144,329,134,328,130,337,122,330,113,325,106,322,103"
href="/state.php?state=Iowa"
alt="Iowa" title="Iowa"   />
<area shape="poly" coords="283,143,292,162,295,181,294,197,340,197,340,203,348,196,349,188,338,172,340,165,333,162,325,152,324,143"
href="/state.php?state=Missouri"
alt="Missouri" title="Missouri"   />
<area shape="poly" coords="295,197,295,234,300,239,302,244,333,243,333,232,341,215,346,204,340,201,341,197,337,196"
href="/state.php?state=Arkansas"
alt="Arkansas" title="Arkansas"   />
<area shape="poly" coords="301,243,304,261,307,270,302,287,321,287,327,284,341,291,349,289,360,292,356,287,357,280,352,278,349,269,329,266,335,249,332,241"
href="/state.php?state=Louisiana"
alt="Louisiana" title="Louisiana"   />
<area shape="poly" coords="314,62,309,76,310,87,323,96,326,108,331,117,357,114,358,99,362,78,356,82,356,74,341,66,327,61,323,58"
href="/state.php?state=Wisconsin"
alt="Wisconsin" title="Wisconsin"   />
<area shape="poly" coords="333,116,337,123,331,130,329,134,325,146,331,159,339,161,340,173,347,183,356,184,364,170,363,137,359,120,356,116"
href="/state.php?state=Illinois"
alt="Illinois" title="Illinois"   />
<area shape="poly" coords="352,185,349,193,367,192,408,188,423,173,415,161,408,159,394,156,389,163,380,172,366,176,361,177"
href="/state.php?state=Kentucky"
alt="Kentucky" title="Kentucky"   />
<area shape="poly" coords="349,194,342,214,400,211,408,201,422,194,429,184,373,191,364,191"
href="/state.php?state=Tennessee"
alt="Tennessee" title="Tennessee"   />
<area shape="poly" coords="340,216,334,226,332,235,335,250,329,264,336,269,349,267,353,275,365,274,363,214"
href="/state.php?state=Mississippi"
alt="Mississippi" title="Mississippi"   />
<area shape="poly" coords="364,213,363,255,365,273,377,274,373,266,402,263,403,244,391,212"
href="/state.php?state=Alabama"
alt="Alabama" title="Alabama"   />
<area shape="poly" coords="391,211,402,244,404,263,438,266,439,260,446,242,423,216,413,207"
href="/state.php?state=Georgia"
alt="Georgia" title="Georgia"   />
<area shape="poly" coords="374,266,378,273,390,273,397,277,407,278,418,275,430,280,432,298,444,316,459,328,470,328,469,310,458,283,449,268,442,260,435,260,433,264,422,264,404,265,399,261"
href="/state.php?state=Florida"
alt="Florida" title="Florida"   />
<area shape="poly" coords="416,208,417,213,433,226,447,245,462,225,470,214,453,204,442,206,439,202,428,202"
href="/state.php?state=South Carolina"
alt="South Carolina" title="South Carolina"   />
<area shape="poly" coords="428,185,415,197,402,205,407,209,424,204,439,202,456,205,471,215,487,202,492,185,488,175"
href="/state.php?state=North Carolina"
alt="North Carolina" title="North Carolina"   />
<area shape="poly" coords="422,174,412,186,444,184,487,175,487,169,482,167,480,157,474,153,470,148,465,142,458,143,453,150,447,154,442,167,434,173"
href="/state.php?state=Virginia"
alt="Virginia" title="Virginia"   />
<area shape="poly" coords="327,60,337,66,352,71,355,82,360,73,376,66,392,64,384,57,377,55,367,58,357,58,351,55,351,49,341,53"
href="/state.php?state=Michigan"
alt="Michigan" title="Michigan"   />
<area shape="poly" coords="382,68,378,77,371,84,368,95,372,112,368,124,388,121,401,120,409,103,405,89,401,90,395,96,393,88,398,72"
href="/state.php?state=Michigan"
alt="Michigan" title="Michigan"   />
<area shape="poly" coords="363,125,364,154,361,172,370,173,386,166,394,157,388,121"
href="/state.php?state=Indiana"
alt="Indiana" title="Indiana"   />
<area shape="poly" coords="389,122,393,156,409,160,418,161,426,149,433,140,430,113,419,120,410,122,404,121,401,119"
href="/state.php?state=Ohio"
alt="Ohio" title="Ohio" />
<area shape="poly" coords="431,136,430,144,422,150,416,159,420,168,429,175,439,169,445,158,449,154,456,144,462,142,458,140,451,143,445,145,442,141,437,142"
href="/state.php?state=West Virginia"
alt="West Virginia" title="West Virginia"   />
<area shape="poly" coords="430,112,434,141,486,131,489,125,484,119,486,107,479,102,455,108"
href="/state.php?state=Pennsylvania"
alt="Pennsylvania" title="Pennsylvania"   />
<area shape="poly" coords="441,92,441,100,434,107,454,107,477,102,487,109,499,112,497,95,494,74,489,65,489,59,477,59,468,69,463,80,459,87"
href="/state.php?state=New York"
alt="New York" title="New York"   />
<area shape="poly" coords="445,139,448,145,459,138,468,142,472,154,480,155,487,150,478,142,481,134,470,134"
href="/state.php?state=Maryland"
alt="Maryland" title="Maryland"   />
<area shape="poly" coords="507,153,507,164,525,164,525,153"
href="/state.php?state=Maryland"
alt="Maryland" title="Maryland"   />
<area shape="poly" coords="507,138,507,149,525,149,525,138"
href="/state.php?state=Delaware"
alt="Delaware" title="Delaware"   />
<area shape="poly" coords="507,122,507,133,525,133,525,122"
href="/state.php?state=New Jersey"
alt="New Jersey" title="New Jersey"   />
<area shape="poly" coords="520,108,520,119,538,119,538,108"
href="/state.php?state=Connecticut"
alt="Connecticut" title="Connecticut"   />
<area shape="poly" coords="530,93,530,104,548,104,548,93"
href="/state.php?state=Rhode Island"
alt="Rhode Island" title="Rhode Island"   />
<area shape="poly" coords="528,77,528,88,546,88,546,77"
href="/state.php?state=Massachusetts"
alt="Massachusetts" title="Massachusetts"   />
<area shape="poly" coords="463,45,463,56,481,56,481,45"
href="/state.php?state=Vermont"
alt="Vermont" title="Vermont"   />
<area shape="poly" coords="484,31,484,42,502,42,502,31"
href="/state.php?state=New Hampshire"
alt="New Hampshire" title="New Hampshire"   />
<area shape="poly" coords="506,50,520,80,527,65,545,49,544,42,535,33,529,16,523,16,516,19,515,31,511,42"
href="/state.php?state=Maine"
alt="Maine" title="Maine"   />
<area shape="poly" coords="52,249,42,253,37,260,31,265,32,270,39,276,39,285,32,281,22,282,26,292,37,294,39,302,30,305,27,313,28,324,39,329,48,337,43,348,33,356,21,360,7,364,12,369,33,362,48,353,59,343,68,333,78,327,85,321,105,321,131,332,147,344,158,340,154,329,141,324,130,316,114,312,107,303,99,271,92,253,84,250,66,250"
href="/state.php?state=Alaska"
alt="Alaska" title="Alaska"   />
<area shape="poly" coords="147,290,145,298,153,297,165,300,170,308,185,312,187,323,197,331,207,325,201,316,192,306,184,299,171,294,161,288,151,288"
href="/state.php?state=Hawaii"
alt="Hawaii" title="Hawaii"   />
<area shape="poly" coords="487,110,485,115,489,125,488,130,484,132,491,137,497,134,497,123,494,117"
href="/state.php?state=New Jersey"
alt="New Jersey" title="New Jersey"   />
<area shape="poly" coords="490,59,492,73,497,86,502,80,504,63,504,55"
href="/state.php?state=Vermont"
alt="Vermont" title="Vermont"   />
<area shape="poly" coords="506,51,505,61,503,74,502,86,513,83,519,80,512,67"
href="/state.php?state=New Hampshire"
alt="New Hampshire" title="New Hampshire"   />
<area shape="poly" coords="497,88,498,97,516,93,524,95,529,91,522,87,519,83,511,83"
href="/state.php?state=Massachusetts"
alt="Massachusetts" title="Massachusetts"   />
<area shape="rect" coords="548,373,550,375"
href="http://www.image-maps.com/index.php?aff=mapped_users_812073229"
alt="Image Map" title="Image Map" />
</map>
person Stephen Fuhry    schedule 09.05.2011