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×åìó ðàâíà åäèíèöà èçìåðåíèÿ øèðîòû èëè äîëãîòû?

 
           Ðàçãîâîðû îá Àìåðèêå -> Ïðî êîìïû
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Andrew
Ãëàâíûé òðåïà÷


: 01.03.2003
: 10421
: Èðêóòñê, RU -> Los Angeles, US

: , 27, 2007 11:13pm     : ×åìó ðàâíà åäèíèöà èçìåðåíèÿ øèðîòû èëè äîëãîòû?

Âîçìîæíî, äëÿ îäíîãî ñàéòà ïðèäåòñÿ ñäåëàòü èíñòðóìåíò, ïîêàçûâàþùèé äèëëåðîâ â çàäàííîì ðàäèóñå îò óêàçàííîãî zip-êîäà, ëèáî îò óêàçàííîãî ãîðîäà è øòàòà (÷òî, â ïðèíöèïå, òî æå ñàìîå).

Êàê òîëüêî ÷òî âûÿñíèë, ñóùåñòâóåò áàçà äàííûõ zip-êîäîâ ñ ñàìîé ðàçíîîáðàçíîé èíôîðìàöèåé, ïðèâÿçàííîé ê äàííîìó zip. Íàïðèìåð, êîëè÷åñòâî íàñåëåíèÿ, óðîâåíü ïðèñòóïíîñòè è ò. ä. Íî ýòî âñå ëèøíÿÿ èíôîðìàöèÿ Óëûáêà Ñàìîå âàæíîå çäåñü, ÷òî ó êàæäîãî zip'à åñòü ñâîÿ øèðîòà è äîëãîòà.

Ñîîòâåòñòâåííî, ïðîãðàììà äîëæíà ïîêàçûâàòü ëèøü äèëëåðîâ â ðàäèóñå îò çàäàííûõ êîîðäèíàò.

Åäèíñòâåííîå, ÷òî íåïîíÿòíî - êàê âûñ÷èòûâàòü ýòîò ðàäèóñ? Âîò, íàïðèìåð, äëÿ zip-êîäà 10001 êîîðäèíàòû ñëåäóþùèå:
Lat: 40.75 Lon: -73.99
Êàê îòíÿòü, íàïðèìåð, 5 ìèëü?

Äðóãèìè ñëîâàìè, ÷åìó ðàâíà åäèíèöà èçìåðåíèÿ øèðîòû èëè äîëãîòû â ìèëÿõ èëè êèëîìåòðàõ?
_________________
Àíäðåé Ãåðàñèìîâ
Debaser
Æèòåëü ôîðóìà


: 28.03.2003
: 941
: Cleveland, OH

: , 27, 2007 11:25pm     :

Êàê òû ïîíèìàåøü, ýòî ïðîñòûå óãëû, èçìåðÿþòñÿ â ãðàäóñàõ. Íó êàê ïåðåâåñòè latitude ãðàäóñû â ìèëè âñå áîëåå ìåíåå ïîíÿòíî, çåìëÿ ïðèìåðíî êðóãëàÿ.
:
As Earth is not a smooth sphere, but slightly oblate, a degree of latitude varies in length from about 111.3195 km at the equator to 110.9462 km at the poles. A degree of arc at a latitude not only varies with latitude, but also with the direction being faced. To simplify calculations where elliptical consideration is not important, the nautical mile was created, equaling exactly 111.12 km per degree of arc or, sub-dividing into minutes, 1852 metres per minute of arc. One minute of latitude can be further divided into 60 seconds. A latitude is thus specified as 13°19'43″ N (for greater precision, a decimal fraction can be added to the seconds). An alternative representation uses only degrees and minutes, where the seconds are expressed as a decimal fraction of minutes, thus the above example is expressed as 13°19.717' N. Degrees can also be expressed singularly, with both the minutes and seconds incorporated as a decimal number and rounded as desired (decimal degree notation): 13.32861° N. Sometimes, the north/south suffix is replaced by a negative sign for south (−90° for the South Pole).

Ñ longitude âñå ñëîæíåå, ïîòîìó ÷òî çåìëÿ îïÿòü æå êðóãëàÿ è ÷åì áëèæå ê ïîëþñó òåì ìåíüøå ìåòðîâ â ãðàäóñå. Êîðî÷å âîò òåáå ññûëêà íà ïðîñòûå ôîðìóëû, èçó÷àé! Óëûáêà

Andrew ():

Lat: 40.75 Lon: -73.99
Êàê îòíÿòü, íàïðèìåð, 5 ìèëü?
À ýòî ñìîòðÿ â êàêîì íàïðàâëåíèè îòíèìàòü. Íó íàðèñóé îêðóæíîñòü íà ñôåðå è íàïèøè åãî óðàâíåíèå â ïîëÿðíûõ êîîðäèíàòàõ. Phi è Psi êàê ðàç è áóäåò øèðîòà è äîëãîòà.
_________________
Êëàññíî!
Andrew
Ãëàâíûé òðåïà÷


: 01.03.2003
: 10421
: Èðêóòñê, RU -> Los Angeles, US

: , 27, 2007 11:49pm     :

Debaser, ñïàñèáî! Áóäó ðàçáèðàòüñÿ.
_________________
Àíäðåé Ãåðàñèìîâ
White Owl
Øòàòíûé çàíóäà


: 10.03.2003
: 2452
: USA, New York City

: , 28, 2007 3:02pm     :

Òû Debaser íå ñëóøàé, îí ñòîïðîöåíòíî ïðàâ, íî òåì íå ìåíåå îí ñîâåðøåííî íå ïðàâ Óëûáêà

Òåáå íå íóæíî çàíèìàòüñÿ ðó÷íûì ðàñ÷åòîì ìèëü, õîòÿ áû ïîòîìó, ÷òî òå äèëëåðû êîòîðûå îò òåáÿ â Õ ìèëÿõ ñàìè íå çíàþò ñâîèõ ãåîãðàôè÷åñêèõ êîîðäèíàò. Òåáå ïðèéäåòñÿ íå òîëüêî çàíèìàòüñÿ ìàòåìàòèêîé, íî è ñàìîñòîÿòåëüíî áåãàòü ïî äèëëåðàì ñ ñåñêòàíòîì è âû÷èñëÿòü èõ êîîðäèíàòû.

Êîðî÷å, ïðàâèëüíûé îòâåò: èäåøü
âîò ñþäà íàïðèìåð òàì ðåãèñòðèðóåøü ñâîé áèçíåñ è äåëàåøü ññûëêè íà ñâîè ôèëèàëû èëè äðóæåñòâåííûå áèçíåñû. È íèêîãî òâîÿ øèðîòà è äîëãîòà íå áóäåò âîëíîâàòü Óëûáêà
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Andrew
Ãëàâíûé òðåïà÷


: 01.03.2003
: 10421
: Èðêóòñê, RU -> Los Angeles, US

: , 28, 2007 3:19pm     :

White Owl ():
Òåáå íå íóæíî çàíèìàòüñÿ ðó÷íûì ðàñ÷åòîì ìèëü, õîòÿ áû ïîòîìó, ÷òî òå äèëëåðû êîòîðûå îò òåáÿ â Õ ìèëÿõ ñàìè íå çíàþò ñâîèõ ãåîãðàôè÷åñêèõ êîîðäèíàò.

Google çíàåò Óëûáêà

Ââîäèøü àäðåñ, çàòåì íàæèìàåøü íà ññûëêó "Link to this page", è â íåé áåðåøü êîîðäèíàòû äèëëåðà. Òàê êàê çàíèìàòüñÿ ýòîé ðóòèíîé ïðåäñòîèò íå ìíå - ñïîñîá ñ÷èòàþ íîðìàëüíûì Óëûáêà

Äà è â ëþáîì ñëó÷àå, òî÷íûõ ðàñ÷åòîâ çäåñü íå òðåáóåòñÿ. Äîñòàòî÷íî, ÷òîáû êëèåíò íàøåë áëèæàéøåãî äèëëåðà íà ðàññòîÿíèè 50 èëè 100 ìèëü. Ìîæíî áóäåò îãðàíè÷èòüñÿ è zip-êîäîì. Åñëè äàæå áóäåò ïîãðåøíîñòü â 3-5 ìèëü - ýòî íèêîãî íå âîëíóåò (êàê ñ÷èòàåò è ñàì çàêàç÷èê).

White Owl ():
Êîðî÷å, ïðàâèëüíûé îòâåò: èäåøü
âîò ñþäà íàïðèìåð òàì ðåãèñòðèðóåøü ñâîé áèçíåñ è äåëàåøü ññûëêè íà ñâîè ôèëèàëû èëè äðóæåñòâåííûå áèçíåñû. È íèêîãî òâîÿ øèðîòà è äîëãîòà íå áóäåò âîëíîâàòü Óëûáêà

ß íå ñîìíåâàþñü, áèçíåñû òàì óæå çàðåãèñòðèðîâàíû. Íî êëèåíò - ýòî íå âñå ïîäðÿä. Ýòî ÷åëîâåê, êîòîðûé òàê èëè èíà÷å ñêîíòàêòèðóåò ñ êîìïàíèåé (ïîçâîíèò, ëèáî çàéäåò íà ñàéò), ïîñëå ÷åãî óæå îòïðàâëÿòü åãî â íóæíûé ðàçäåë.
_________________
Àíäðåé Ãåðàñèìîâ
White Owl
Øòàòíûé çàíóäà


: 10.03.2003
: 2452
: USA, New York City

: , 28, 2007 4:16pm     :

Andrew ():
Ââîäèøü àäðåñ, çàòåì íàæèìàåøü íà ññûëêó "Link to this page", è â íåé áåðåøü êîîðäèíàòû äèëëåðà. Òàê êàê çàíèìàòüñÿ ýòîé ðóòèíîé ïðåäñòîèò íå ìíå - ñïîñîá ñ÷èòàþ íîðìàëüíûì Óëûáêà
Ñîâåðøåííî íå íîðìàëüíûé.


Andrew ():
ß íå ñîìíåâàþñü, áèçíåñû òàì óæå çàðåãèñòðèðîâàíû. Íî êëèåíò - ýòî íå âñå ïîäðÿä. Ýòî ÷åëîâåê, êîòîðûé òàê èëè èíà÷å ñêîíòàêòèðóåò ñ êîìïàíèåé (ïîçâîíèò, ëèáî çàéäåò íà ñàéò), ïîñëå ÷åãî óæå îòïðàâëÿòü åãî â íóæíûé ðàçäåë.
Íó è? Êàê òû ñåáå ýòîò ðàçäåë ïðåäñòàâëÿåøü?

Çàäàé ãóãëþ âîëøåáíûå ñëîâà store locator ïîëó÷èøü äåñÿòêè ïðåäëîæåíèé îò ðàçëè÷íûõ ñåðâèñîâ (íå òîëüêî ãóãëÿ) êàê ñäåëàòü òî ÷òî òû õî÷åøü.
Âîò íàïðèìåð íåïëîõîé http://www.ultimatelocator.com/
Èëè ýòîò: http://www.iqservices.com/xlocator/
íàøà êîíòîðà íàïðÿìóþ ó ãóãëÿ, ÿõó è ìàïêâåñòà ýòè ñåðâèñû êóïèëà. Íà ãóãëîâñêèé ÿ òåáå ññûëêó äàë óæå.
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Andrew
Ãëàâíûé òðåïà÷


: 01.03.2003
: 10421
: Èðêóòñê, RU -> Los Angeles, US

: , 28, 2007 5:00pm     :

White Owl ():
Íó è? Êàê òû ñåáå ýòîò ðàçäåë ïðåäñòàâëÿåøü?

×åëîâåê ââîäèò ñâîé zip, óêàçûâàåò ðàäèóñ ïîèñêà, íàõîäèò.

White Owl ():
Çàäàé ãóãëþ âîëøåáíûå ñëîâà store locator ïîëó÷èøü äåñÿòêè ïðåäëîæåíèé îò ðàçëè÷íûõ ñåðâèñîâ (íå òîëüêî ãóãëÿ) êàê ñäåëàòü òî ÷òî òû õî÷åøü.

Óæå èñêàë. Ïîêà îñòàíîâèë âûáîð íà ýòîì: http://www.myzipdb.com/
_________________
Àíäðåé Ãåðàñèìîâ
White Owl
Øòàòíûé çàíóäà


: 10.03.2003
: 2452
: USA, New York City

: , 28, 2007 8:28pm     :

Andrew ():
White Owl ():
Íó è? Êàê òû ñåáå ýòîò ðàçäåë ïðåäñòàâëÿåøü?

×åëîâåê ââîäèò ñâîé zip, óêàçûâàåò ðàäèóñ ïîèñêà, íàõîäèò.
À ãóãëü åùå è êàðòó ðèñóåò è ôëàæêè íà íåé ñòàâèò Óëûáêà

Andrew ():
White Owl ():
Çàäàé ãóãëþ âîëøåáíûå ñëîâà store locator ïîëó÷èøü äåñÿòêè ïðåäëîæåíèé îò ðàçëè÷íûõ ñåðâèñîâ (íå òîëüêî ãóãëÿ) êàê ñäåëàòü òî ÷òî òû õî÷åøü.

Óæå èñêàë. Ïîêà îñòàíîâèë âûáîð íà ýòîì: http://www.myzipdb.com/
Íóóó... ñóäÿ ïî îïèñàíèþ íè÷å òàê. Íà ïðàêòèêå ñìîòðåòü íàäî. ß âñå æå îñòàþñü ñòîðîííèêîì öåíòðàëèçîâàíûõ êàðòîãðàôè÷åñêèõ ñàéòîâ.
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Andrew
Ãëàâíûé òðåïà÷


: 01.03.2003
: 10421
: Èðêóòñê, RU -> Los Angeles, US

: , 28, 2007 8:54pm     :

White Owl ():
ß âñå æå îñòàþñü ñòîðîííèêîì öåíòðàëèçîâàíûõ êàðòîãðàôè÷åñêèõ ñàéòîâ.

ß òîæå Óëûáêà Íî çíàÿ ïðåäïîëàãàåìûé áþäæåò ïðîåêòà - ìíå õî÷åòñÿ ñäåëàòü ëèøü áû ðàáîòàëî, à íå êàê óäîáíåé è êðàñèâåé. Ïîéìè ïðàâèëüíî.
_________________
Àíäðåé Ãåðàñèìîâ
White Owl
Øòàòíûé çàíóäà


: 10.03.2003
: 2452
: USA, New York City

: , 29, 2007 1:29pm     :

Andrew ():
White Owl ():
ß âñå æå îñòàþñü ñòîðîííèêîì öåíòðàëèçîâàíûõ êàðòîãðàôè÷åñêèõ ñàéòîâ.

ß òîæå Óëûáêà Íî çíàÿ ïðåäïîëàãàåìûé áþäæåò ïðîåêòà - ìíå õî÷åòñÿ ñäåëàòü ëèøü áû ðàáîòàëî, à íå êàê óäîáíåé è êðàñèâåé. Ïîéìè ïðàâèëüíî.
ß ïðåêðàñíî ïîíèìàþ... Òîëüêî, "ñêóïîé ïëàòèò äâàæäû". Õî÷åòñÿ ÷òîá õîòü êòî-íèáóäü ñðàçó ñäåëàë ïðàâèëüíî.
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Andrew
Ãëàâíûé òðåïà÷


: 01.03.2003
: 10421
: Èðêóòñê, RU -> Los Angeles, US

: , 29, 2007 3:22pm     :

White Owl ():
ß ïðåêðàñíî ïîíèìàþ... Òîëüêî, "ñêóïîé ïëàòèò äâàæäû". Õî÷åòñÿ ÷òîá õîòü êòî-íèáóäü ñðàçó ñäåëàë ïðàâèëüíî.

Äàæå ïðåäñòàâèòü ñåáå íå ìîæåøü, íàñêîëüêî ýòîò ÷åëîâåê ñêóïîé... Íî ýòî óæå îôôòîï Óëûáêà
_________________
Àíäðåé Ãåðàñèìîâ
MaxNero
Æèòåëü ôîðóìà


: 19.04.2005
: 641
: Different city in USA :) -> Moscow, RU -> USA

: , 29, 2007 6:41pm     :

Âñå òàêè ïðèñìîòðèñü ê Google Map - îòòóäà ìîæíî ìíîãî ÷åãî âûòàùèòü ñ ïîìîùüþ APIs, äëÿ ñåáÿ âîçìîæíî íàéäåøü ÷òî-òî èíòåðåñíîå íà áóäóùåå.  èíåòå ìíîãî ãîòîâûõ ïðèìåðîâ ñ áèáëèîòåêàìè.
Andrew
Ãëàâíûé òðåïà÷


: 01.03.2003
: 10421
: Èðêóòñê, RU -> Los Angeles, US

: , 29, 2007 9:53pm     :

MaxNero ():
Âñå òàêè ïðèñìîòðèñü ê Google Map - îòòóäà ìîæíî ìíîãî ÷åãî âûòàùèòü ñ ïîìîùüþ APIs, äëÿ ñåáÿ âîçìîæíî íàéäåøü ÷òî-òî èíòåðåñíîå íà áóäóùåå.  èíåòå ìíîãî ãîòîâûõ ïðèìåðîâ ñ áèáëèîòåêàìè.

Â÷åðà êàê ðàç ïðîáåæàëñÿ ïî ðàçäåëó, ïîñâÿùåííîìó API - èíòåðåñíî. Ñïàñèáî!
_________________
Àíäðåé Ãåðàñèìîâ
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