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Choosing coordinate reference systems?
The Next CEO of Stack OverflowEfficiently projecting datasets of varying coordinate systems into one coordinate system?Coordinate systems and bearingsHow to overlay two shapefiles with different coordinate system?How to create a customized grid with two coordinate systems?How do i identify unknown coordinates reference system for my dataProjecting vs. export using data frame projection?Different coordinate systems match in QGIS but not in ArcGISMerge layers that have different coordinate systemsConverting coordinate systems of shapefiles using QGIS?Two shapefiles (polygon) with same reference system have different extent
I have downloaded some shapefiles from two different sources both of which show different aspects of the same area.
However, they have different Coordinate reference systems. One has the reference system GCS_Airy 1830, while the other has OSBG_1936_British_National_Grid.
Will this prove to be an issue down the line, and if so how do I choose between the two systems?
arcgis-desktop coordinate-system arcgis-10.0 united-kingdom
edited 22 hours ago
PolyGeo♦
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asked yesterday
tom91tom91
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tom91 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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I have downloaded some shapefiles from two different sources both of which show different aspects of the same area.
However, they have different Coordinate reference systems. One has the reference system GCS_Airy 1830, while the other has OSBG_1936_British_National_Grid.
Will this prove to be an issue down the line, and if so how do I choose between the two systems?
arcgis-desktop coordinate-system arcgis-10.0 united-kingdom
edited 22 hours ago
PolyGeo♦
53.8k1781245
asked yesterday
tom91tom91
31
New contributor
tom91 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
I have downloaded some shapefiles from two different sources both of which show different aspects of the same area.
However, they have different Coordinate reference systems. One has the reference system GCS_Airy 1830, while the other has OSBG_1936_British_National_Grid.
Will this prove to be an issue down the line, and if so how do I choose between the two systems?
arcgis-desktop coordinate-system arcgis-10.0 united-kingdom
edited 22 hours ago
PolyGeo♦
53.8k1781245
asked yesterday
tom91tom91
31
New contributor
tom91 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I have downloaded some shapefiles from two different sources both of which show different aspects of the same area.
However, they have different Coordinate reference systems. One has the reference system GCS_Airy 1830, while the other has OSBG_1936_British_National_Grid.
Will this prove to be an issue down the line, and if so how do I choose between the two systems?
arcgis-desktop coordinate-system arcgis-10.0 united-kingdom
arcgis-desktop coordinate-system arcgis-10.0 united-kingdom
edited 22 hours ago
PolyGeo♦
53.8k1781245
asked yesterday
tom91tom91
31
New contributor
tom91 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 22 hours ago
PolyGeo♦
53.8k1781245
asked yesterday
tom91tom91
31
New contributor
tom91 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 22 hours ago
PolyGeo♦
53.8k1781245
edited 22 hours ago
PolyGeo♦
53.8k1781245
edited 22 hours ago
PolyGeo♦
53.8k1781245
53.8k1781245
asked yesterday
tom91tom91
31
New contributor
tom91 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked yesterday
tom91tom91
31
asked yesterday
tom91tom91
31
31
New contributor
tom91 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
tom91 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
tom91 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
add a comment |
1 Answer
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As I understand it GCS_Airy_1830 is the datum for the projected coordinate system OSBG_1936_British_National_Grid. So they are not different coordinate systems. A datum is a component of a coordinate system. As you are working on data in the UK ensure your datasets are projected into the British National Grid, this will make subsequently mapping and analysis stress free.
edited yesterday
PolyGeo♦
53.8k1781245
answered yesterday
HornbyddHornbydd
26.9k32957
Thank you for the clarification, I will do so from now on!
– tom91
12 hours ago
To get the data into BNG, redefine (in ArcGIS, Define Projection tool) to OSGB 1936 first, then use Project tool to change to BNG. Otherwise, you may get a warning or requirement asking about a geographic/datum transformation.
– mkennedy
10 hours ago
add a comment |
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1 Answer
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1 Answer
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oldest
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votes
As I understand it GCS_Airy_1830 is the datum for the projected coordinate system OSBG_1936_British_National_Grid. So they are not different coordinate systems. A datum is a component of a coordinate system. As you are working on data in the UK ensure your datasets are projected into the British National Grid, this will make subsequently mapping and analysis stress free.
edited yesterday
PolyGeo♦
53.8k1781245
answered yesterday
HornbyddHornbydd
26.9k32957
Thank you for the clarification, I will do so from now on!
– tom91
12 hours ago
To get the data into BNG, redefine (in ArcGIS, Define Projection tool) to OSGB 1936 first, then use Project tool to change to BNG. Otherwise, you may get a warning or requirement asking about a geographic/datum transformation.
– mkennedy
10 hours ago
add a comment |
As I understand it GCS_Airy_1830 is the datum for the projected coordinate system OSBG_1936_British_National_Grid. So they are not different coordinate systems. A datum is a component of a coordinate system. As you are working on data in the UK ensure your datasets are projected into the British National Grid, this will make subsequently mapping and analysis stress free.
edited yesterday
PolyGeo♦
53.8k1781245
answered yesterday
HornbyddHornbydd
26.9k32957
Thank you for the clarification, I will do so from now on!
– tom91
12 hours ago
To get the data into BNG, redefine (in ArcGIS, Define Projection tool) to OSGB 1936 first, then use Project tool to change to BNG. Otherwise, you may get a warning or requirement asking about a geographic/datum transformation.
– mkennedy
10 hours ago
add a comment |
As I understand it GCS_Airy_1830 is the datum for the projected coordinate system OSBG_1936_British_National_Grid. So they are not different coordinate systems. A datum is a component of a coordinate system. As you are working on data in the UK ensure your datasets are projected into the British National Grid, this will make subsequently mapping and analysis stress free.
edited yesterday
PolyGeo♦
53.8k1781245
answered yesterday
HornbyddHornbydd
26.9k32957
As I understand it GCS_Airy_1830 is the datum for the projected coordinate system OSBG_1936_British_National_Grid. So they are not different coordinate systems. A datum is a component of a coordinate system. As you are working on data in the UK ensure your datasets are projected into the British National Grid, this will make subsequently mapping and analysis stress free.
edited yesterday
PolyGeo♦
53.8k1781245
answered yesterday
HornbyddHornbydd
26.9k32957
edited yesterday
PolyGeo♦
53.8k1781245
edited yesterday
PolyGeo♦
53.8k1781245
edited yesterday
PolyGeo♦
53.8k1781245
53.8k1781245
answered yesterday
HornbyddHornbydd
26.9k32957
answered yesterday
HornbyddHornbydd
26.9k32957
answered yesterday
HornbyddHornbydd
26.9k32957
26.9k32957
Thank you for the clarification, I will do so from now on!
– tom91
12 hours ago
To get the data into BNG, redefine (in ArcGIS, Define Projection tool) to OSGB 1936 first, then use Project tool to change to BNG. Otherwise, you may get a warning or requirement asking about a geographic/datum transformation.
– mkennedy
10 hours ago
add a comment |
Thank you for the clarification, I will do so from now on!
– tom91
12 hours ago
To get the data into BNG, redefine (in ArcGIS, Define Projection tool) to OSGB 1936 first, then use Project tool to change to BNG. Otherwise, you may get a warning or requirement asking about a geographic/datum transformation.
– mkennedy
10 hours ago
Thank you for the clarification, I will do so from now on!
– tom91
12 hours ago
Thank you for the clarification, I will do so from now on!
– tom91
12 hours ago
To get the data into BNG, redefine (in ArcGIS, Define Projection tool) to OSGB 1936 first, then use Project tool to change to BNG. Otherwise, you may get a warning or requirement asking about a geographic/datum transformation.
– mkennedy
10 hours ago
To get the data into BNG, redefine (in ArcGIS, Define Projection tool) to OSGB 1936 first, then use Project tool to change to BNG. Otherwise, you may get a warning or requirement asking about a geographic/datum transformation.
– mkennedy
10 hours ago
add a comment |
tom91 is a new contributor. Be nice, and check out our Code of Conduct.
tom91 is a new contributor. Be nice, and check out our Code of Conduct.
tom91 is a new contributor. Be nice, and check out our Code of Conduct.
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