Airport information, from map to hotels via aeronautical information. And the aeronautical weather for the pilots with current weather and short-term forecasts with METAR (METeorological Aerodrome Report, observation message of meteorological conditions for aviation) and TAF (Terminal Aerodrome Forecast: short-term forecast message of meteorological conditions for aviation ). And other resources such as VAC (Visual Approach Chart) to prepare flights.
Piedmont Triad International airport in Greensboro (United State)
Piedmont Triad International airport is located near Greensboro, with Oak Ridge at 6mi↑, Jamestown at 7mi↑, Kernersville at 8mi↑, Summerfield at 8mi↑, Guilford County at 8mi↑, Greensboro at 8mi↑,→ See also Northernmost airports in United State and Southernmost airports in United State
→ See also airports in United State
aerial view of Piedmont Triad International airport
Airport code
- ICAO code : KGSO
- IATA code : GSO
- Local code : -
Elevation : 282 m = 925ft
→ See also Highest airports in USA and Lowest airports in United State
Runways
- runway 05R/23L : 3048m = 10000ft
- runway 05L/23R : 2743m = 8999ft
- runway 14/32 : 1945m = 6381ft
→ See also Airports with Longest runways in United State
Coming to Piedmont Triad International airport
Hotels : book on Hotels.com Booking Expedia
Taxi : book on Taxi Booking
activities : Getyourguide
Rent a car : book on Rentalcars
By plane :
- Piedmont Triad International airport at 0mi : book on Iberia
- Smith Reynolds airport at 16mi : book on Trip.com
- Mid-Carolina Regional airport at 45mi : book on Trip.com
Aviation weather for Piedmont Triad International airport KGSO GSO
NOTAM for Piedmont Triad International airport
NOTAMs are provided without any guarantee of their topicality. The pilot is the only person responsible for the verification of its validity before using it operationally to prepare a flight or to use it during its navigation.
NOTAM A0007/23 GSO IAP PIEDMONT TRIAD INTL,
valid from Wednesday, January 4, 2023 at 19:42 to Saturday, January 4, 2025 at 19:42
GREENSBORO, NC.
ILS OR LOC RWY 5R, AMDT 7C...
S-ILS 5R DA NA ALL CATS. VDP NA.
Issued on Wednesday, January 4, 2023 at 19:43
NOTAM A1382/24
valid from Thursday, December 26, 2024 at 19:55 to Friday, December 26, 2025 at 22:00
Issued on Thursday, December 26, 2024 at 19:55
NOTAM 12/092
valid from Thursday, December 26, 2024 at 19:55 to Friday, December 26, 2025 at 22:00
Issued on Thursday, December 26, 2024 at 19:55
NOTAM 01/003
valid from Saturday, January 4, 2025 at 15:54 to Tuesday, December 30, 2025 at 04:00
Issued on Friday, January 3, 2025 at 19:29
NOTAM A0372/25
valid from Friday, January 31, 2025 at 06:19 to Friday, January 30, 2026 at 20:00
Issued on Friday, January 31, 2025 at 06:29
NOTAM A0586/25 GSO IAP PIEDMONT TRIAD INTL,
valid from Thursday, March 6, 2025 at 18:50 to Thursday, April 16, 2026 at 23:59
GREENSBORO, NC.
RNAV (GPS) RWY 5R, AMDT 2G ...
ALL CATS LNAV MDA 1320/HAT 420. VISIBLITY CAT D 1
Issued on Thursday, March 6, 2025 at 18:50
NOTAM 5/0162 IAP PIEDMONT TRIAD INTL, GREENSBORO, NC.
valid from Thursday, March 6, 2025 at 18:50 to Thursday, April 16, 2026 at 23:59
RNAV (GPS) RWY 5R, AMDT 2G ...
ALL CATS LNAV MDA 1320/HAT 420. VISIBLITY CAT D 1 2503061850-2604162359EST
Issued on Thursday, March 6, 2025 at 18:50
NOTAM A0981/25
valid from Friday, June 6, 2025 at 12:40 to Wednesday, January 14, 2026 at 20:00
Issued on Friday, June 6, 2025 at 12:49
NOTAM 06/021
valid from Friday, June 6, 2025 at 12:40 to Wednesday, January 14, 2026 at 20:00
Issued on Friday, June 6, 2025 at 12:40
NOTAM 5/5204 SID PIEDMONT TRIAD INTL, GREENSBORO, NC.
valid from Monday, June 16, 2025 at 17:24 to Monday, January 26, 2026 at 17:24
QUAKER EIGHT DEPARTURE...
ROANOKE TRANSITION NA EXCEPT FOR AIRCRAFT EQUIPPED WITH SUITABLE RNAV SYSTEM WITH GPS,
ROA VOR/DME OUT OF SERVICE. 2506161724-2601261724EST
Issued on Monday, June 16, 2025 at 17:24
NOTAM A1009/25 GSO SID PIEDMONT TRIAD INTL,
valid from Monday, June 16, 2025 at 17:24 to Monday, January 26, 2026 at 17:24
GREENSBORO, NC.
QUAKER EIGHT DEPARTURE...
ROANOKE TRANSITION NA EXCEPT FOR AIRCRAFT EQUIPPED WITH SUITABLE
RNAV SYSTEM WITH GPS,
ROA VOR/DME OUT OF SERVICE.
Issued on Monday, June 16, 2025 at 17:32
NOTAM 08/004
valid from Friday, August 1, 2025 at 14:11 to Monday, February 2, 2026 at 21:00
Issued on Friday, August 1, 2025 at 14:11
NOTAM A1280/25
valid from Monday, August 4, 2025 at 12:00 to Monday, February 2, 2026 at 23:00
Issued on Friday, August 1, 2025 at 14:14
NOTAM 08/006
valid from Monday, August 4, 2025 at 12:00 to Monday, February 2, 2026 at 23:00
Issued on Friday, August 1, 2025 at 14:14
NOTAM 08/005
valid from Monday, August 4, 2025 at 12:00 to Monday, February 2, 2026 at 23:00
Issued on Friday, August 1, 2025 at 14:12
NOTAM A1281/25
valid from Monday, August 4, 2025 at 12:00 to Monday, February 2, 2026 at 23:00
Issued on Friday, August 1, 2025 at 14:15
NOTAM A1319/25 GSO IAP PIEDMONT TRIAD INTL,
valid from Tuesday, August 12, 2025 at 15:53 to Monday, March 2, 2026 at 15:53
GREENSBORO, NC.
ILS OR LOC RWY 23L, AMDT 9D...
ILS OR LOC RWY 23R, ORIG-E...
ILS OR LOC RWY 5L, ORIG-D...
ILS Y OR LOC Y RWY 32, ORIG-B...
ILS Z OR LOC Z RWY 32, ORIG-B...
RNAV (GPS) RWY 14, AMDT 2B...
RNAV (GPS) RWY 23L, AMDT 2F...
RNAV (GPS) RWY 23R, ORIG-E...
RNAV (GPS) RWY 32, AMDT 3B...
RNAV (GPS) RWY 5L, ORIG-E...
VOR/DME RWY 23L, AMDT 10C...
CIRCLING MDA CAT A/B 1500/HAA 574. TEMPORARY CRANE 1147 MSL 3233FT
SE OF GSO AIRPORT (2025-ASO-284-NRA).
Issued on Tuesday, August 12, 2025 at 15:55
NOTAM 5/5979 IAP PIEDMONT TRIAD INTL, GREENSBORO, NC.
valid from Tuesday, August 12, 2025 at 15:53 to Monday, March 2, 2026 at 15:53
ILS OR LOC RWY 5R, AMDT 7D...
S-ILS 5R DA 1209/HAT 309 ALL CATS. S-LOC 5R MDA 1400/HAT 500 ALL CATS, VIS CATS C/D RVR 5000. CIRCLING MDA CAT A/B 1500/HAA 574. VDP AT I-LZY 3.2 DME; DISTANCE VDP TO THLD 1.4NM. CHANGE NOTE TO READ: FOR INOP ALS, INCREASE S-ILS 5R ALL CATS VISIBILITY TO RVR 4500 AND S-LOC 5R CAT C/D VISIBILITY TO 1 3/8 SM. DISREGARD RVR 1800 AUTHORIZATION NOTE. TEMPORARY CRANE 1147 MSL 2999FT NE OF RWY 5R (2025-ASO-284-NRA).
2508121553-2603021553EST
Issued on Tuesday, August 12, 2025 at 15:54
NOTAM 5/5980 IAP PIEDMONT TRIAD INTL, GREENSBORO, NC.
valid from Tuesday, August 12, 2025 at 15:53 to Monday, March 2, 2026 at 15:53
ILS RWY 5R (SA CAT II), AMDT 7D ...
PROCEDURE NA. TEMPORARY CRANE 1147 MSL 2999FT NE OF RWY 5R (2025-ASO-284-NRA). TEMPORARY CRANES 1019 MSL 5104FT NE OF RWY 5R (2024-ASO-8382 THRU 8385-NRA). 2508121553-2603021553EST
Issued on Tuesday, August 12, 2025 at 15:54
NOTAM 5/5981 IAP PIEDMONT TRIAD INTL, GREENSBORO, NC.
valid from Tuesday, August 12, 2025 at 15:53 to Monday, March 2, 2026 at 15:53
ILS RWY 23L (CAT II), AMDT 9D ...
PROCEDURE NA. TEMPORARY CRANE 1147 MSL 1.2NM SW OF RWY 5R (2025-ASO-284-NRA). TEMPORARY CRANES 1019 MSL 4772FT SW OF RWY 23L (2024-ASO-8382 THRU 8385-NRA). 2508121553-2603021553EST
Issued on Tuesday, August 12, 2025 at 15:54
NOTAM 5/5982 IAP PIEDMONT TRIAD INTL, GREENSBORO, NC.
valid from Tuesday, August 12, 2025 at 15:53 to Monday, March 2, 2026 at 15:53
RNAV (GPS) RWY 5R, AMDT 2G...
LPV DA 1209/HAT 309 ALL CATS. CIRCLING MDA CAT A/B 1500/HAA 574. CHANGE NOTE TO READ: FOR INOP ALS, INCREASE LPV ALL CATS VISIBILITY TO RVR 4500 AND LNAV CAT C/D VISIBILITY TO RVR 6000. DISREGARD RVR 1800 AUTHORIZATION NOTE. TEMPORARY CRANE 1147 MSL 2999FT NE OF RWY 5R (2025-ASO-284-NRA).
2508121553-2603021553EST
Issued on Tuesday, August 12, 2025 at 15:54
NOTAM 5/5975 IAP PIEDMONT TRIAD INTL, GREENSBORO, NC.
valid from Tuesday, August 12, 2025 at 15:53 to Monday, March 2, 2026 at 15:53
ILS OR LOC RWY 23L, AMDT 9D...
ILS OR LOC RWY 23R, ORIG-E...
ILS OR LOC RWY 5L, ORIG-D...
ILS Y OR LOC Y RWY 32, ORIG-B...
ILS Z OR LOC Z RWY 32, ORIG-B...
RNAV (GPS) RWY 14, AMDT 2B...
RNAV (GPS) RWY 23L, AMDT 2F...
RNAV (GPS) RWY 23R, ORIG-E...
RNAV (GPS) RWY 32, AMDT 3B...
RNAV (GPS) RWY 5L, ORIG-E...
VOR/DME RWY 23L, AMDT 10C...
CIRCLING MDA CAT A/B 1500/HAA 574. TEMPORARY CRANE 1147 MSL 3233FT SE OF GSO AIRPORT (2025-ASO-284-NRA).
2508121553-2603021553EST
Issued on Tuesday, August 12, 2025 at 15:54
NOTAM A1320/25 GSO IAP PIEDMONT TRIAD INTL,
valid from Tuesday, August 12, 2025 at 15:53 to Monday, March 2, 2026 at 15:53
GREENSBORO, NC.
ILS OR LOC RWY 5R, AMDT 7D...
S-ILS 5R DA 1209/HAT 309 ALL CATS. S-LOC 5R MDA 1400/HAT 500 ALL
CATS, VIS CATS C/D RVR 5000. CIRCLING MDA CAT A/B 1500/HAA 574.
VDP AT I-LZY 3.2 DME; DISTANCE VDP TO THLD 1.4NM. CHANGE NOTE TO
READ: FOR INOP ALS, INCREASE S-ILS 5R ALL CATS VISIBILITY TO RVR
4500 AND S-LOC 5R CAT C/D VISIBILITY TO 1 3/8 SM. DISREGARD RVR
1800 AUTHORIZATION NOTE. TEMPORARY CRANE 1147 MSL 2999FT NE OF RWY
5R (2025-ASO-284-NRA).
Issued on Tuesday, August 12, 2025 at 15:55
NOTAM A1322/25 GSO IAP PIEDMONT TRIAD INTL,
valid from Tuesday, August 12, 2025 at 15:53 to Monday, March 2, 2026 at 15:53
GREENSBORO, NC.
ILS RWY 23L (CAT II), AMDT 9D ...
PROCEDURE NA. TEMPORARY CRANE 1147 MSL 1.2NM SW OF RWY 5R
(2025-ASO-284-NRA). TEMPORARY CRANES 1019 MSL 4772FT SW OF RWY 23L
(2024-ASO-8382 THRU 8385-NRA).
Issued on Tuesday, August 12, 2025 at 15:55
NOTAM A1323/25 GSO IAP PIEDMONT TRIAD INTL,
valid from Tuesday, August 12, 2025 at 15:53 to Monday, March 2, 2026 at 15:53
GREENSBORO, NC.
RNAV (GPS) RWY 5R, AMDT 2G...
LPV DA 1209/HAT 309 ALL CATS. CIRCLING MDA CAT A/B 1500/HAA 574.
CHANGE NOTE TO READ: FOR INOP ALS, INCREASE LPV ALL CATS VISIBILITY
TO RVR 4500 AND LNAV CAT C/D VISIBILITY TO RVR 6000. DISREGARD RVR
1800 AUTHORIZATION NOTE. TEMPORARY CRANE 1147 MSL 2999FT NE OF RWY
5R (2025-ASO-284-NRA).
Issued on Tuesday, August 12, 2025 at 15:55
NOTAM A1321/25 GSO IAP PIEDMONT TRIAD INTL,
valid from Tuesday, August 12, 2025 at 15:53 to Monday, March 2, 2026 at 15:53
GREENSBORO, NC.
ILS RWY 5R (SA CAT II), AMDT 7D ...
PROCEDURE NA. TEMPORARY CRANE 1147 MSL 2999FT NE OF RWY 5R
(2025-ASO-284-NRA). TEMPORARY CRANES 1019 MSL 5104FT NE OF RWY 5R
(2024-ASO-8382 THRU 8385-NRA).
Issued on Tuesday, August 12, 2025 at 15:55
NOTAM 10/050
valid from Wednesday, October 29, 2025 at 03:35 to Saturday, December 13, 2025 at 03:35
Issued on Wednesday, October 29, 2025 at 03:35
NOTAM 11/015
valid from Tuesday, November 18, 2025 at 10:57 to Thursday, January 1, 2026 at 22:00
Issued on Tuesday, November 18, 2025 at 10:57
NOTAM 11/022
valid from Friday, November 21, 2025 at 06:20 to Saturday, December 6, 2025 at 05:20
Issued on Friday, November 21, 2025 at 06:19
NOTAM 5/1014 SID PIEDMONT TRIAD INTL, GREENSBORO, NC.
valid from Thursday, November 27, 2025 at 09:05 to Thursday, February 26, 2026 at 11:59
QUAKER EIGHT DEPARTURE...
PROCEDURE NA.
2511270905-2602261159EST
Issued on Monday, November 24, 2025 at 12:01
NOTAM A1744/25 GSO SID PIEDMONT TRIAD INTL,
valid from Thursday, November 27, 2025 at 09:05 to Thursday, February 26, 2026 at 11:59
GREENSBORO, NC.
QUAKER EIGHT DEPARTURE...
PROCEDURE NA.
Issued on Monday, November 24, 2025 at 12:02
NOTAM A1754/25 A1754/25 NOTAMC A1750/25
valid from Wednesday, December 3, 2025 at 14:40 to Saturday, December 6, 2025 at 14:40
Q) KZTL/QITXX/I/NBO/A/000/999/3606N07956W005
A) KGSO
B) 2512031440
E) GSO NAV ILS RWY 05L CAT II NA
CANCELED
Issued on Wednesday, December 3, 2025 at 14:40
NOTAM A1755/25 A1755/25 NOTAMC A1751/25
valid from Wednesday, December 3, 2025 at 14:40 to Saturday, December 6, 2025 at 14:40
Q) KZTL/QLAXX////000/999/3606N07956W005
A) KGSO
B) 2512031440
E) GSO RWY 05L ALS U/S
CANCELED
Issued on Wednesday, December 3, 2025 at 14:40
NOTAM A1756/25 A1756/25 NOTAMC A0796/25
valid from Wednesday, December 3, 2025 at 14:54 to Saturday, December 6, 2025 at 14:54
Q) KZTL/QPIXX/I/NBO/A/000/999/
A) KGSO
B) 2512031454
E) GSO IAP PIEDMONT TRIAD INTL,
CANCELED
Issued on Wednesday, December 3, 2025 at 14:54
NOTAM 5/3664 IAP PIEDMONT TRIAD INTL, GREENSBORO, NC.
valid from Wednesday, December 3, 2025 at 14:54 to Wednesday, July 15, 2026 at 14:54
ILS RWY 5L (CAT II AND III), ORIG-D ...
S-ILS 5L CAT II NA EXCEPT FOR AIRCRAFT EQUIPPED WITH RADAR ALTIMETER. I-LLG INNER MARKER OUT OF SERVICE. 2512031454-2607151454EST
Issued on Wednesday, December 3, 2025 at 14:54
NOTAM A1757/25 GSO IAP PIEDMONT TRIAD INTL,
valid from Wednesday, December 3, 2025 at 14:54 to Wednesday, July 15, 2026 at 14:54
GREENSBORO, NC.
ILS RWY 5L (CAT II AND III), ORIG-D ...
S-ILS 5L CAT II NA EXCEPT FOR AIRCRAFT EQUIPPED WITH RADAR
ALTIMETER. I-LLG INNER MARKER OUT OF SERVICE.
Issued on Wednesday, December 3, 2025 at 14:54
NOTAM 5/4017 SID PIEDMONT TRIAD INTL, GREENSBORO, NC.
valid from Wednesday, December 3, 2025 at 17:05 to Saturday, January 3, 2026 at 17:05
QUAKER EIGHT DEPARTURE...
RALEIGH-DURHAM TRANSITION: NA EXCEPT FOR ACFT EQUIPPED WITH SUITABLE RNAV SYSTEM WITH GPS,
RDU VOR OUT OF SERVICE. 2512031705-2601031705EST
Issued on Wednesday, December 3, 2025 at 17:06
NOTAM A1758/25 GSO SID PIEDMONT TRIAD INTL,
valid from Wednesday, December 3, 2025 at 17:05 to Saturday, January 3, 2026 at 17:05
GREENSBORO, NC.
QUAKER EIGHT DEPARTURE...
RALEIGH-DURHAM TRANSITION: NA EXCEPT FOR ACFT EQUIPPED WITH
SUITABLE RNAV SYSTEM WITH GPS,
RDU VOR OUT OF SERVICE.
Issued on Wednesday, December 3, 2025 at 17:07
NOTAM A1760/25 A1760/25 NOTAMC A1752/25
valid from Wednesday, December 3, 2025 at 17:49 to Saturday, December 6, 2025 at 17:49
Q) KZTL/QICXX////000/999/3606N07956W005
A) KGSO
B) 2512031749
E) GSO NAV ILS RWY 23R U/S
CANCELED
Issued on Wednesday, December 3, 2025 at 17:49
NOTAM A1759/25 A1759/25 NOTAMC A1753/25
valid from Wednesday, December 3, 2025 at 17:49 to Saturday, December 6, 2025 at 17:49
Q) KZTL/QICXX////000/999/3606N07956W005
A) KGSO
B) 2512031749
E) GSO NAV ILS RWY 05L U/S
CANCELED
Issued on Wednesday, December 3, 2025 at 17:49
NOTAM 5/4370 IAP PIEDMONT TRIAD INTL, GREENSBORO, NC.
valid from Wednesday, December 3, 2025 at 00:21 to Saturday, January 3, 2026 at 00:21
ILS OR LOC RWY 23L, AMDT 9D...
ILS OR LOC RWY 23R, ORIG-E...
ILS OR LOC RWY 5L, ORIG-D...
ILS RWY 23L (CAT II), AMDT 9D...
ILS RWY 5L (CAT II-III), ORIG-D...
ALTERNATE MINIMUMS NA EXCEPT FOR ACFT EQUIPPED WITH SUITABLE RNAV SYSTEM WITH GPS,
LIB VORTAC UNMONITORED. 2512040021-2601040021EST
Issued on Wednesday, December 3, 2025 at 00:21
NOTAM A1762/25 GSO IAP PIEDMONT TRIAD INTL,
valid from Wednesday, December 3, 2025 at 00:21 to Saturday, January 3, 2026 at 00:21
GREENSBORO, NC.
ILS OR LOC RWY 23L, AMDT 9D...
ILS OR LOC RWY 23R, ORIG-E...
ILS OR LOC RWY 5L, ORIG-D...
ILS RWY 23L (CAT II), AMDT 9D...
ILS RWY 5L (CAT II-III), ORIG-D...
ALTERNATE MINIMUMS NA EXCEPT FOR ACFT EQUIPPED WITH SUITABLE RNAV
SYSTEM WITH GPS,
LIB VORTAC UNMONITORED.
Issued on Wednesday, December 3, 2025 at 00:28
NOTAM A1761/25
valid from Thursday, December 4, 2025 at 13:00 to Thursday, December 4, 2025 at 21:00
Issued on Wednesday, December 3, 2025 at 20:47
NOTAM 12/007
valid from Thursday, December 4, 2025 at 13:00 to Thursday, December 4, 2025 at 23:00
Issued on Wednesday, December 3, 2025 at 13:31
NOTAM 12/008
valid from Thursday, December 4, 2025 at 13:00 to Thursday, December 4, 2025 at 21:00
Issued on Wednesday, December 3, 2025 at 20:40
NOTAM 12/009
valid from Thursday, December 4, 2025 at 13:00 to Thursday, December 4, 2025 at 21:00
Issued on Wednesday, December 3, 2025 at 20:40
Around Piedmont Triad International airport in Greensboro (United State)
near
- Hotels in Oak Ridge
- Renaissance Philadelphia Downtown Hotel (Philadelphia) at 372mi↑
- MoMA (New York) at 456mi↑
- Guggenheim Museum Bilbao (Bilbao) at 3978mi↑
- Hotel NH Collection San Sebastián Aránzazu (San Sebastián) at 4021mi↑
- Sercotel Codina (San Sebastian) at 4021mi↑
- Aquarium de Donostia-San Sebastián (San Sebastian) at 4021mi↑
- Hotel de Londres y de Inglaterra (San Sebastian) at 4022mi↑
- San Sebastian at 4022mi↑
- Eureka! Zientzia Museoa (San Sebastiàn) at 4022mi↑
- Saint-Jean-de-Luz at 4035mi↑
- Hôtel Txoko (Saint-Jean-de-Luz) at 4035mi↑
- Grand Hôtel Thalasso & Spa (Saint-Jean-de-Luz) at 4035mi↑
- for Piedmont Triad International airport at 0mi↑
- for DS Butler Farm and airport at 8mi↑
- for Meylor Field airport at 8mi↑
nearest airports to Piedmont Triad International airport in Greensboro (United State)
- DS Butler Farm and airport ( N83) at 8mi↑
- Meylor Field airport ( 9NC9) at 8mi↑
- Air Harbor airport ( W88) at 9mi↑
- Balloonport of Greensboro balloonport ( 28NC) at 12mi↑
- Darr Field airport ( NC03) at 14mi↑
- Robertson Field airport ( NC63) at 14mi↑
- May airport ( 80NC) at 15mi↑
- Smith Reynolds airport (KINT INT ) at 16mi↑METAR TAF NOTAM
- Fields airport ( 64NC) at 16mi↑
- Greensboro Executive airport ( K3A4) at 18mi↑
- Mountain View Aerodrome airport ( NC37) at 18mi↑
- Johnson Field airport ( US-7050) at 18mi↑defunct airport
- Meadow Brook Field airport ( N63) at 18mi↑
- Fairgrove airport ( US-7054) at 19mi↑defunct airport
- Dusenbury Field airport ( 13NR) at 19mi↑
- Lindsay airport ( 0NC7) at 19mi↑
→ See also Former airports in United State
Data sources
- Infos générales : AVWX, France FFPLUM
- METAR : AVWX
- TAF : AVWX
- Météo générale : Openweathermap et AVWX
- NOTAM : FAA
- VAC : France DGAC/SIA, Espagne ENAIRE, Belgique SKEYES
- Aerial maps : Google Maps, Microsoft Bing ou OpenStreetMap