3,813 results returned
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Title: World (4G Mobile Phone Coverage, 2014)
Contributors:- Polygon data
- 2014
Summary: Collins Mobile Coverage Explorer is a representation of the area covered by mobile communications around the world. The data is created from submissions, made directly to Collins Bartholomew or the GSMA from mobile operators, which provide roaming detail for inclusion in the online mapping application known as Collins Mobile Coverage Web.
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Title: World (3G Mobile Phone Coverage Inclusion, 2014)
Contributors:- Point data
- 2014
Summary: These inclusion metadata files for GSM, 3G, and 4G mobile coverage are an attempt at listing all the networks which are included in the separate world mobile phone coverage datasets. Unfortunately the lists cannot be comprehensive because legacy datasets did not maintain the information required to make them complete.
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Title: World (4G Mobile Phone Coverage Inclusion, 2014)
Contributors:- Point data
- 2014
Summary: These inclusion metadata files for GSM, 3G, and 4G mobile coverage are an attempt at listing all the networks which are included in the separate world mobile phone coverage datasets. Unfortunately the lists cannot be comprehensive because legacy datasets did not maintain the information required to make them complete.
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Title: World (GSM Mobile Phone Coverage Inclusion, 2014)
Contributors:- Point data
- 2014
Summary: These inclusion metadata files for GSM, 3G, and 4G mobile coverage are an attempt at listing all the networks which are included in the separate world mobile phone coverage datasets. Unfortunately the lists cannot be comprehensive because legacy datasets did not maintain the information required to make them complete.
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Title: Global 2G Mobile Coverage Explorer, 2012
Contributors:- Raster data
- 2021
Summary: This raster dataset is a representation of the coverage area for 2G mobile communications networks around the world. Mobile Coverage is released annually in January each year. This data release is named 2012. Any operator data received up to the end of the year 2011 is included in this release. The coverages have been sourced directly from the network operators. However, not every operator has submitted data and so there are inevitable gaps in coverage. The data is created from submissions made directly to Collins Bartholomew or the GSMA from mobile operators, which provide roaming detail for inclusion in the online mapping application known as Collins Mobile Coverage Web. The cell values in the MCE rasters are as follows: 1 – strong signal strength 2 – variable signal strength.Polygons representing the network coverage have been split into country areas using the country polygons from the Collins World Explorer vector product. Polygons are supplied as multipart, and include any country ISO or FIPS codes where known. The data is supplied with a nominal resolution of approximately 1km on the ground. This map can be used to locate and analyze mobile communications coverage on a global scale. This map can be used to locate and analyze mobile communications coverage on a global scale. Collins Bartholomew Ltd.. (2021). Global 2G Mobile Coverage Explorer, 2012. Collins Bartholomew Ltd.. Available at: http://purl.stanford.edu/mk182nq4355 Operators are asked to submit strong (>= -92dBm) and variable (>= -100dBm and < 92dBm) signal strengths as part of their submissions. The data here includes both types but does not make a distinction between the two. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.
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Title: Global 4G Mobile Coverage Explorer, 2014
Contributors:- Raster data
- 2021
Summary: This raster dataset is a representation of the coverage area for 4G mobile communications networks around the world. Mobile Coverage is released annually in January each year. This data release is named 2014. Any operator data received up to the end of the year 2013 is included in this release. The coverages have been sourced directly from the network operators. However, not every operator has submitted data and so there are inevitable gaps in coverage. The data is created from submissions made directly to Collins Bartholomew or the GSMA from mobile operators, which provide roaming detail for inclusion in the online mapping application known as Collins Mobile Coverage Web. The cell values in the MCE rasters are as follows: 1 – strong signal strength 2 – variable signal strength.Polygons representing the network coverage have been split into country areas using the country polygons from the Collins World Explorer vector product. Polygons are supplied as multipart, and include any country ISO or FIPS codes where known. The data is supplied with a nominal resolution of approximately 1km on the ground. This map can be used to locate and analyze mobile communications coverage on a global scale. This map can be used to locate and analyze mobile communications coverage on a global scale. Collins Bartholomew Ltd.. (2021). Global 4G Mobile Coverage Explorer, 2014. Collins Bartholomew Ltd.. Available at: http://purl.stanford.edu/wj954tm4956 Operators are asked to submit strong (>= -92dBm) and variable (>= -100dBm and < 92dBm) signal strengths as part of their submissions. The data here includes both types but does not make a distinction between the two. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.
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Title: Global 3G Mobile Coverage Explorer, 2013
Contributors:- Raster data
- 2021
Summary: This raster dataset is a representation of the coverage area for 3G mobile communications networks around the world. Mobile Coverage is released annually in January each year. This data release is named 2013. Any operator data received up to the end of the year 2012 is included in this release. The coverages have been sourced directly from the network operators. However, not every operator has submitted data and so there are inevitable gaps in coverage. The data is created from submissions made directly to Collins Bartholomew or the GSMA from mobile operators, which provide roaming detail for inclusion in the online mapping application known as Collins Mobile Coverage Web. The cell values in the MCE rasters are as follows: 1 – strong signal strength 2 – variable signal strength.Polygons representing the network coverage have been split into country areas using the country polygons from the Collins World Explorer vector product. Polygons are supplied as multipart, and include any country ISO or FIPS codes where known. The data is supplied with a nominal resolution of approximately 1km on the ground. This map can be used to locate and analyze mobile communications coverage on a global scale. This map can be used to locate and analyze mobile communications coverage on a global scale. Collins Bartholomew Ltd.. (2021). Global 3G Mobile Coverage Explorer, 2013. Collins Bartholomew Ltd.. Available at: http://purl.stanford.edu/dg771jv6579 Operators are asked to submit strong (>= -92dBm) and variable (>= -100dBm and < 92dBm) signal strengths as part of their submissions. The data here includes both types but does not make a distinction between the two. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.
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Title: Global 4G Mobile Coverage Explorer, 2013
Contributors:- Raster data
- 2021
Summary: This raster dataset is a representation of the coverage area for 4G mobile communications networks around the world. Mobile Coverage is released annually in January each year. This data release is named 2013. Any operator data received up to the end of the year 2012 is included in this release. The coverages have been sourced directly from the network operators. However, not every operator has submitted data and so there are inevitable gaps in coverage. The data is created from submissions made directly to Collins Bartholomew or the GSMA from mobile operators, which provide roaming detail for inclusion in the online mapping application known as Collins Mobile Coverage Web. The cell values in the MCE rasters are as follows: 1 – strong signal strength 2 – variable signal strength.Polygons representing the network coverage have been split into country areas using the country polygons from the Collins World Explorer vector product. Polygons are supplied as multipart, and include any country ISO or FIPS codes where known. The data is supplied with a nominal resolution of approximately 1km on the ground. This map can be used to locate and analyze mobile communications coverage on a global scale. This map can be used to locate and analyze mobile communications coverage on a global scale. Collins Bartholomew Ltd.. (2021). Global 4G Mobile Coverage Explorer, 2013. Collins Bartholomew Ltd.. Available at: http://purl.stanford.edu/hg104my0376 Operators are asked to submit strong (>= -92dBm) and variable (>= -100dBm and < 92dBm) signal strengths as part of their submissions. The data here includes both types but does not make a distinction between the two. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.
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Title: Global 3G Mobile Coverage Explorer, 2014
Contributors:- Raster data
- 2021
Summary: This raster dataset is a representation of the coverage area for 3G mobile communications networks around the world. Mobile Coverage is released annually in January each year. This data release is named 2014. Any operator data received up to the end of the year 2013 is included in this release. The coverages have been sourced directly from the network operators. However, not every operator has submitted data and so there are inevitable gaps in coverage. The data is created from submissions made directly to Collins Bartholomew or the GSMA from mobile operators, which provide roaming detail for inclusion in the online mapping application known as Collins Mobile Coverage Web. The cell values in the MCE rasters are as follows: 1 – strong signal strength 2 – variable signal strength.Polygons representing the network coverage have been split into country areas using the country polygons from the Collins World Explorer vector product. Polygons are supplied as multipart, and include any country ISO or FIPS codes where known. The data is supplied with a nominal resolution of approximately 1km on the ground. This map can be used to locate and analyze mobile communications coverage on a global scale. This map can be used to locate and analyze mobile communications coverage on a global scale. Collins Bartholomew Ltd.. (2021). Global 3G Mobile Coverage Explorer, 2014. Collins Bartholomew Ltd.. Available at: http://purl.stanford.edu/pd038fr9690 Operators are asked to submit strong (>= -92dBm) and variable (>= -100dBm and < 92dBm) signal strengths as part of their submissions. The data here includes both types but does not make a distinction between the two. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.
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Title: Global 4G Mobile Coverage Explorer, 2015
Contributors:- Raster data
- 2021
Summary: This raster dataset is a representation of the coverage area for 4G mobile communications networks around the world. Mobile Coverage is released annually in January each year. This data release is named 2015. Any operator data received up to the end of the year 2014 is included in this release. The coverages have been sourced directly from the network operators. However, not every operator has submitted data and so there are inevitable gaps in coverage. The data is created from submissions made directly to Collins Bartholomew or the GSMA from mobile operators, which provide roaming detail for inclusion in the online mapping application known as Collins Mobile Coverage Web. The cell values in the MCE rasters are as follows: 1 – strong signal strength 2 – variable signal strength.Polygons representing the network coverage have been split into country areas using the country polygons from the Collins World Explorer vector product. Polygons are supplied as multipart, and include any country ISO or FIPS codes where known. The data is supplied with a nominal resolution of approximately 1km on the ground. This map can be used to locate and analyze mobile communications coverage on a global scale. This map can be used to locate and analyze mobile communications coverage on a global scale. Collins Bartholomew Ltd.. (2021). Global 4G Mobile Coverage Explorer, 2015. Collins Bartholomew Ltd.. Available at: http://purl.stanford.edu/wp332fk4868 Operators are asked to submit strong (>= -92dBm) and variable (>= -100dBm and < 92dBm) signal strengths as part of their submissions. The data here includes both types but does not make a distinction between the two. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.
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Title: Global 3G Mobile Coverage Explorer, 2016
Contributors:- Raster data
- 2021
Summary: This raster dataset is a representation of the coverage area for 3G mobile communications networks around the world. Mobile Coverage is released annually in January each year. This data release is named 2016. Any operator data received up to the end of the year 2015 is included in this release. The coverages have been sourced directly from the network operators. However, not every operator has submitted data and so there are inevitable gaps in coverage. The data is created from submissions made directly to Collins Bartholomew or the GSMA from mobile operators, which provide roaming detail for inclusion in the online mapping application known as Collins Mobile Coverage Web. The cell values in the MCE rasters are as follows: 1 – strong signal strength 2 – variable signal strength.Polygons representing the network coverage have been split into country areas using the country polygons from the Collins World Explorer vector product. Polygons are supplied as multipart, and include any country ISO or FIPS codes where known. The data is supplied with a nominal resolution of approximately 1km on the ground. This map can be used to locate and analyze mobile communications coverage on a global scale. This map can be used to locate and analyze mobile communications coverage on a global scale. Collins Bartholomew Ltd.. (2021). Global 3G Mobile Coverage Explorer, 2016. Collins Bartholomew Ltd.. Available at: http://purl.stanford.edu/ky819sb7704 Operators are asked to submit strong (>= -92dBm) and variable (>= -100dBm and < 92dBm) signal strengths as part of their submissions. The data here includes both types but does not make a distinction between the two. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.
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Title: Global 3G Mobile Coverage Explorer, 2010
Contributors:- Raster data
- 2021
Summary: This raster dataset is a representation of the coverage area for 3G mobile communications networks around the world. Mobile Coverage is released annually in January each year. This data release is named 2010. Any operator data received up to the end of the year 2009 is included in this release. The coverages have been sourced directly from the network operators. However, not every operator has submitted data and so there are inevitable gaps in coverage. The data is created from submissions made directly to Collins Bartholomew or the GSMA from mobile operators, which provide roaming detail for inclusion in the online mapping application known as Collins Mobile Coverage Web. The cell values in the MCE rasters are as follows: 1 – strong signal strength 2 – variable signal strength.Polygons representing the network coverage have been split into country areas using the country polygons from the Collins World Explorer vector product. Polygons are supplied as multipart, and include any country ISO or FIPS codes where known. The data is supplied with a nominal resolution of approximately 1km on the ground. This map can be used to locate and analyze mobile communications coverage on a global scale. This map can be used to locate and analyze mobile communications coverage on a global scale. Collins Bartholomew Ltd.. (2021). Global 3G Mobile Coverage Explorer, 2010. Collins Bartholomew Ltd.. Available at: http://purl.stanford.edu/zq615rv6737 Operators are asked to submit strong (>= -92dBm) and variable (>= -100dBm and < 92dBm) signal strengths as part of their submissions. The data here includes both types but does not make a distinction between the two. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.
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Title: Global 4G Mobile Coverage Explorer, 2016
Contributors:- Raster data
- 2021
Summary: This raster dataset is a representation of the coverage area for 4G mobile communications networks around the world. Mobile Coverage is released annually in January each year. This data release is named 2016. Any operator data received up to the end of the year 2015 is included in this release. The coverages have been sourced directly from the network operators. However, not every operator has submitted data and so there are inevitable gaps in coverage. The data is created from submissions made directly to Collins Bartholomew or the GSMA from mobile operators, which provide roaming detail for inclusion in the online mapping application known as Collins Mobile Coverage Web. The cell values in the MCE rasters are as follows: 1 – strong signal strength 2 – variable signal strength.Polygons representing the network coverage have been split into country areas using the country polygons from the Collins World Explorer vector product. Polygons are supplied as multipart, and include any country ISO or FIPS codes where known. The data is supplied with a nominal resolution of approximately 1km on the ground. This map can be used to locate and analyze mobile communications coverage on a global scale. This map can be used to locate and analyze mobile communications coverage on a global scale. Collins Bartholomew Ltd.. (2021). Global 4G Mobile Coverage Explorer, 2016. Collins Bartholomew Ltd.. Available at: http://purl.stanford.edu/ss289hn6132 Operators are asked to submit strong (>= -92dBm) and variable (>= -100dBm and < 92dBm) signal strengths as part of their submissions. The data here includes both types but does not make a distinction between the two. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.
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Title: Global 3G Mobile Coverage Explorer, 2017
Contributors:- Raster data
- 2021
Summary: This raster dataset is a representation of the coverage area for 3G mobile communications networks around the world. Mobile Coverage is released annually in January each year. This data release is named 2017. Any operator data received up to the end of the year 2016 is included in this release. The coverages have been sourced directly from the network operators. However, not every operator has submitted data and so there are inevitable gaps in coverage. The data is created from submissions made directly to Collins Bartholomew or the GSMA from mobile operators, which provide roaming detail for inclusion in the online mapping application known as Collins Mobile Coverage Web. The cell values in the MCE rasters are as follows: 1 – strong signal strength 2 – variable signal strength.Polygons representing the network coverage have been split into country areas using the country polygons from the Collins World Explorer vector product. Polygons are supplied as multipart, and include any country ISO or FIPS codes where known. The data is supplied with a nominal resolution of approximately 1km on the ground. This map can be used to locate and analyze mobile communications coverage on a global scale. This map can be used to locate and analyze mobile communications coverage on a global scale. Collins Bartholomew Ltd.. (2021). Global 3G Mobile Coverage Explorer, 2017. Collins Bartholomew Ltd.. Available at: http://purl.stanford.edu/by170qy6709 Operators are asked to submit strong (>= -92dBm) and variable (>= -100dBm and < 92dBm) signal strengths as part of their submissions. The data here includes both types but does not make a distinction between the two. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.
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Title: Global 3G Mobile Coverage Explorer, 2011
Contributors:- Raster data
- 2021
Summary: This raster dataset is a representation of the coverage area for 3G mobile communications networks around the world. Mobile Coverage is released annually in January each year. This data release is named 2011. Any operator data received up to the end of the year 2011 is included in this release. The coverages have been sourced directly from the network operators. However, not every operator has submitted data and so there are inevitable gaps in coverage. The data is created from submissions made directly to Collins Bartholomew or the GSMA from mobile operators, which provide roaming detail for inclusion in the online mapping application known as Collins Mobile Coverage Web. The cell values in the MCE rasters are as follows: 1 – strong signal strength 2 – variable signal strength.Polygons representing the network coverage have been split into country areas using the country polygons from the Collins World Explorer vector product. Polygons are supplied as multipart, and include any country ISO or FIPS codes where known. The data is supplied with a nominal resolution of approximately 1km on the ground. This map can be used to locate and analyze mobile communications coverage on a global scale. This map can be used to locate and analyze mobile communications coverage on a global scale. Collins Bartholomew Ltd.. (2021). Global 3G Mobile Coverage Explorer, 2011. Collins Bartholomew Ltd.. Available at: http://purl.stanford.edu/hc904nr7037 Operators are asked to submit strong (>= -92dBm) and variable (>= -100dBm and < 92dBm) signal strengths as part of their submissions. The data here includes both types but does not make a distinction between the two. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.
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Title: Global 2G Mobile Coverage Explorer, 2020
Contributors:- Raster data
- 2021
Summary: This raster dataset is a representation of the coverage area for 2G mobile communications networks around the world. Mobile Coverage is released annually in January each year. This data release is named 2020. Any operator data received up to the end of the year 2019 is included in this release. The coverages have been sourced directly from the network operators. However, not every operator has submitted data and so there are inevitable gaps in coverage. The data is created from submissions made directly to Collins Bartholomew or the GSMA from mobile operators, which provide roaming detail for inclusion in the online mapping application known as Collins Mobile Coverage Web. The cell values in the MCE rasters are as follows: 1 – strong signal strength 2 – variable signal strength.Polygons representing the network coverage have been split into country areas using the country polygons from the Collins World Explorer vector product. Polygons are supplied as multipart, and include any country ISO or FIPS codes where known. The data is supplied with a nominal resolution of approximately 1km on the ground. This map can be used to locate and analyze mobile communications coverage on a global scale. This map can be used to locate and analyze mobile communications coverage on a global scale. Collins Bartholomew Ltd.. (2021). Global 2G Mobile Coverage Explorer, 2020. Collins Bartholomew Ltd.. Available at: http://purl.stanford.edu/ng115dg3900 Operators are asked to submit strong (>= -92dBm) and variable (>= -100dBm and < 92dBm) signal strengths as part of their submissions. The data here includes both types but does not make a distinction between the two. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.
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Title: Global 2G Mobile Coverage Explorer, 2016
Contributors:- Raster data
- 2021
Summary: This raster dataset is a representation of the coverage area for 2G mobile communications networks around the world. Mobile Coverage is released annually in January each year. This data release is named 2016. Any operator data received up to the end of the year 2015 is included in this release. The coverages have been sourced directly from the network operators. However, not every operator has submitted data and so there are inevitable gaps in coverage. The data is created from submissions made directly to Collins Bartholomew or the GSMA from mobile operators, which provide roaming detail for inclusion in the online mapping application known as Collins Mobile Coverage Web. The cell values in the MCE rasters are as follows: 1 – strong signal strength 2 – variable signal strength.Polygons representing the network coverage have been split into country areas using the country polygons from the Collins World Explorer vector product. Polygons are supplied as multipart, and include any country ISO or FIPS codes where known. The data is supplied with a nominal resolution of approximately 1km on the ground. This map can be used to locate and analyze mobile communications coverage on a global scale. This map can be used to locate and analyze mobile communications coverage on a global scale. Collins Bartholomew Ltd.. (2021). Global 2G Mobile Coverage Explorer, 2016. Collins Bartholomew Ltd.. Available at: http://purl.stanford.edu/sg214sm9922 Operators are asked to submit strong (>= -92dBm) and variable (>= -100dBm and < 92dBm) signal strengths as part of their submissions. The data here includes both types but does not make a distinction between the two. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.
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Title: Global 3G Mobile Coverage Explorer, 2018
Contributors:- Raster data
- 2021
Summary: This raster dataset is a representation of the coverage area for 3G mobile communications networks around the world. Mobile Coverage is released annually in January each year. This data release is named 2018. Any operator data received up to the end of the year 2017 is included in this release. The coverages have been sourced directly from the network operators. However, not every operator has submitted data and so there are inevitable gaps in coverage. The data is created from submissions made directly to Collins Bartholomew or the GSMA from mobile operators, which provide roaming detail for inclusion in the online mapping application known as Collins Mobile Coverage Web. The cell values in the MCE rasters are as follows: 1 – strong signal strength 2 – variable signal strength.Polygons representing the network coverage have been split into country areas using the country polygons from the Collins World Explorer vector product. Polygons are supplied as multipart, and include any country ISO or FIPS codes where known. The data is supplied with a nominal resolution of approximately 1km on the ground. This map can be used to locate and analyze mobile communications coverage on a global scale. This map can be used to locate and analyze mobile communications coverage on a global scale. Collins Bartholomew Ltd.. (2021). Global 3G Mobile Coverage Explorer, 2018. Collins Bartholomew Ltd.. Available at: http://purl.stanford.edu/sm584bx7151 Operators are asked to submit strong (>= -92dBm) and variable (>= -100dBm and < 92dBm) signal strengths as part of their submissions. The data here includes both types but does not make a distinction between the two. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.
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Title: Global 2G Mobile Coverage Explorer, 2014
Contributors:- Raster data
- 2021
Summary: This raster dataset is a representation of the coverage area for 2G mobile communications networks around the world. Mobile Coverage is released annually in January each year. This data release is named 2014. Any operator data received up to the end of the year 2013 is included in this release. The coverages have been sourced directly from the network operators. However, not every operator has submitted data and so there are inevitable gaps in coverage. The data is created from submissions made directly to Collins Bartholomew or the GSMA from mobile operators, which provide roaming detail for inclusion in the online mapping application known as Collins Mobile Coverage Web. The cell values in the MCE rasters are as follows: 1 – strong signal strength 2 – variable signal strength.Polygons representing the network coverage have been split into country areas using the country polygons from the Collins World Explorer vector product. Polygons are supplied as multipart, and include any country ISO or FIPS codes where known. The data is supplied with a nominal resolution of approximately 1km on the ground. This map can be used to locate and analyze mobile communications coverage on a global scale. This map can be used to locate and analyze mobile communications coverage on a global scale. Collins Bartholomew Ltd.. (2021). Global 2G Mobile Coverage Explorer, 2014. Collins Bartholomew Ltd.. Available at: http://purl.stanford.edu/kd127ky6186 Operators are asked to submit strong (>= -92dBm) and variable (>= -100dBm and < 92dBm) signal strengths as part of their submissions. The data here includes both types but does not make a distinction between the two. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.
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Title: Global 4G Mobile Coverage Explorer, 2018
Contributors:- Raster data
- 2021
Summary: This raster dataset is a representation of the coverage area for 4G mobile communications networks around the world. Mobile Coverage is released annually in January each year. This data release is named 2018. Any operator data received up to the end of the year 2017 is included in this release. The coverages have been sourced directly from the network operators. However, not every operator has submitted data and so there are inevitable gaps in coverage. The data is created from submissions made directly to Collins Bartholomew or the GSMA from mobile operators, which provide roaming detail for inclusion in the online mapping application known as Collins Mobile Coverage Web. The cell values in the MCE rasters are as follows: 1 – strong signal strength 2 – variable signal strength.Polygons representing the network coverage have been split into country areas using the country polygons from the Collins World Explorer vector product. Polygons are supplied as multipart, and include any country ISO or FIPS codes where known. The data is supplied with a nominal resolution of approximately 1km on the ground. This map can be used to locate and analyze mobile communications coverage on a global scale. This map can be used to locate and analyze mobile communications coverage on a global scale. Collins Bartholomew Ltd.. (2021). Global 4G Mobile Coverage Explorer, 2018. Collins Bartholomew Ltd.. Available at: http://purl.stanford.edu/mw520ys5124 Operators are asked to submit strong (>= -92dBm) and variable (>= -100dBm and < 92dBm) signal strengths as part of their submissions. The data here includes both types but does not make a distinction between the two. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.