Parents (Total: 8)

The searched file hash is included in 8 parent files which include package known and seen by metalookup. A sample is included below:

Key	Value
FileSize	5034996
MD5	DCC9EEAE9624D5415CD888FD797B37FF
PackageDescription	RDNAP grid correction files for PROJ Kadaster and Rijkswaterstaat CIV, working together under the name RDNAP, developed RDNAPTRANS™2008, the precise and official transformation between ETRS89 and the dutch national horizontal and vertical coordinate reference systems the Stelsel van de Rijksdriehoeksmeting (RD) and the Normaal Amsterdams Peil (NAP). A ‘simplified’ procedure has been developed which uses a NTv2-grid for the transformation between ETRS89 and RD as well as a VDatum-grid for the transformation between ETRS89 and NAP. This ‘simplified’ procedure has the following limitations: . 1) The rdtrans2008 NTv2-grid can only give identical results to RDNAPTRANS™2008 within 1 millimeter at ground level onshore and at mean sea level offshore. The horizontal deviation is approximately 1 millimeter per 50 meter height difference from ground level or mean sea level. 2) An exception to 1) is the border of the RDNAPTRANS™2008 correction grid. Transformation results within cells of the rdtrans2008 NTv2-grid that are intersected by the border of the RDNAPTRANS™2008 correction grid can result in deviations of up to 20 centimeter. 3) The naptrans2008 VDatum-grid cannot be used to determine deflections of the vertical. For this the NLGEO2004 geoid model has to be used. 4) The naptrans2008 VDatum-grid is referenced to the Bessel-1841 ellipsoid and cannot be used stand-alone, it has to be used in combination with the rdtrans2008 NTv2-grid. . Taking into account the limitations listed above, the rdtrans2008 NTv2-grid and naptrans2008 VDatum-grid can be used as an alternative to RDNAPTRANS™2008 to transform geographic ETRS89-coordinates to projected RD-coordinates with grid correction applied and NAP-heights. . Note that, although the resulting RD/NAP and ETRS89 coordinates from the transformation will be correct, geographic Bessel-1841 coordinates will differ in both procedures and should only be considered as an intermediate result. . RDNAPTRANS™2018 contains a new datum transformation based on the updated ETRS89 coordinates of realisation ETRF2000(R14). Next to this, a new and slightly more precise quasi-geoid grid model is used. This NLGEO2018 quasi-geoid model covers a larger area including a large part of the North Sea. A change with big impact is the use of a new data format of the grid files and a corresponding transformation procedure that changes the order of the steps of the transformation and uses a fixed height in the datum transformation. As a result, the transformation is now possible conform a de facto standard by including the datum transformation in the correction grid (variant 2). This allows straightforward implementation in software like GIS packages and can resolve current problems due to incorrect implementations of the transformation. . Within the administrative borders of the Netherlands, the differences in the resulting horizontal coordinates due to the changes from version 2008 to 2018 of RDNAPTRANS™ are at maximum 0.010 m at sea level (zero NAP height), and at maximum an additional 0.001 m per 50 m height above or below zero NAP height. The maximum change in the transformed height coordinates due to the slightly more precise new quasi-geoid grid model is about 0.025 m. The new correction grid has a different sampling in ellipsoidal coordinates. With this resampling, discontinuities in the correction grid are smoothed, especially outside the administrative borders of the Netherlands, to allow bilinear interpolation. As a result, changes in the resulting horizontal coordinates up to 0.05 m occur occasionally in Belgium, Germany and the Dutch EEZ. To use the same bounding box around the Netherlands including the Dutch EEZ of the North Sea of the quasi-geoid grid model for the correction grid, the correction grid has been faded out to zero correction for a seamless land-sea transition. This introduces latitude and longitude corrections up to 0.25 m in areas outside the former validity area of RDNAPTRANS™ where no corrections were defined before. . There are two variants for the implementation of RDNAPTRANS™2018. Implementation variant 1 applies the datum transformation as a separate step using a 3D similarity transformation. Implementation variant 2 includes the datum transformation in the correction grid and a different quasi-geoid grid for the height transformation is used. The advantage of implementation variant 1 is that it has no strict bounds for the area where horizontal coordinates can be transformed correctly. The disadvantage is that many software packages do not support implementation variant 1. Implementation variant 2 is supported by more software but can only be used within the bounds of the correction grid. The difference in the resulting coordinates between the two variants is well below 0.0010 m within the bounds of the RDNAPTRANS™2008 grids. Although transformation at sea and even outside the grid bounds is possible, the scale factor of the map projection increases rapidly and also the precision of transformation back and forth deteriorates. There are bounds to the recommended use of RD and NAP at sea and outside the Netherlands.
PackageMaintainer	Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
PackageName	proj-rdnap
PackageSection	non-free/science
PackageVersion	2008+2018-4
SHA-1	A2CF29E82B4082B32DA6D326490DD0089E446F59
SHA-256	B40812BD34D804B5A8F9145DC12A306891B6F28BDE795FAB54BADAFD3A50B7EB

Key	Value
FileSize	1331336
MD5	49CFCE3DFB382728221668FC5B5A8EC6
PackageDescription	RDNAP grid correction files for PROJ.4 Kadaster and Rijkswaterstaat CIV, working together under the name RDNAP, developed RDNAPTRANS™2008, the precise and official transformation between ETRS89 and the dutch national horizontal and vertical coordinate reference systems the Stelsel van de Rijksdriehoeksmeting (RD) and the Normaal Amsterdams Peil (NAP). A ‘simplified’ procedure has been developed which uses a NTv2-grid for the transformation between ETRS89 and RD as well as a VDatum-grid for the transformation between ETRS89 and NAP. This ‘simplified’ procedure has the following limitations: . 1) The rdtrans2008 NTv2-grid can only give identical results to RDNAPTRANS™2008 within 1 millimeter at ground level onshore and at mean sea level offshore. The horizontal deviation is approximately 1 millimeter per 50 meter height difference from ground level or mean sea level. 2) An exception to 1) is the border of the RDNAPTRANS™2008 correction grid. Transformation results within cells of the rdtrans2008 NTv2-grid that are intersected by the border of the RDNAPTRANS™2008 correction grid can result in deviations of up to 20 centimeter. 3) The naptrans2008 VDatum-grid cannot be used to determine deflections of the vertical. For this the NLGEO2004 geoid model has to be used. 4) The naptrans2008 VDatum-grid is referenced to the Bessel-1841 ellipsoid and cannot be used stand-alone, it has to be used in combination with the rdtrans2008 NTv2-grid. . Taking into account the limitations listed above, the rdtrans2008 NTv2-grid and naptrans2008 VDatum-grid can be used as an alternative to RDNAPTRANS™2008 to transform geographic ETRS89-coordinates to projected RD-coordinates with grid correction applied and NAP-heights. . Note that, although the resulting RD/NAP and ETRS89 coordinates from the transformation will be correct, geographic Bessel-1841 coordinates will differ in both procedures and should only be considered as an intermediate result.
PackageMaintainer	Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
PackageName	proj-rdnap
PackageSection	non-free/science
PackageVersion	2008-7
SHA-1	04DC6308E74606EE8653C2A1DA6A11BBBE48DF25
SHA-256	3ABD5EC2704B500047C883F46E6EA2D892B2760032DD4890B476E4B27D3626BF

Key	Value
FileSize	5023628
MD5	7BFDCA4C3A1645C30C1650904B0E7234
PackageDescription	RDNAP grid correction files for PROJ Kadaster and Rijkswaterstaat CIV, working together under the name RDNAP, developed RDNAPTRANS™2008, the precise and official transformation between ETRS89 and the dutch national horizontal and vertical coordinate reference systems the Stelsel van de Rijksdriehoeksmeting (RD) and the Normaal Amsterdams Peil (NAP). A ‘simplified’ procedure has been developed which uses a NTv2-grid for the transformation between ETRS89 and RD as well as a VDatum-grid for the transformation between ETRS89 and NAP. This ‘simplified’ procedure has the following limitations: . 1) The rdtrans2008 NTv2-grid can only give identical results to RDNAPTRANS™2008 within 1 millimeter at ground level onshore and at mean sea level offshore. The horizontal deviation is approximately 1 millimeter per 50 meter height difference from ground level or mean sea level. 2) An exception to 1) is the border of the RDNAPTRANS™2008 correction grid. Transformation results within cells of the rdtrans2008 NTv2-grid that are intersected by the border of the RDNAPTRANS™2008 correction grid can result in deviations of up to 20 centimeter. 3) The naptrans2008 VDatum-grid cannot be used to determine deflections of the vertical. For this the NLGEO2004 geoid model has to be used. 4) The naptrans2008 VDatum-grid is referenced to the Bessel-1841 ellipsoid and cannot be used stand-alone, it has to be used in combination with the rdtrans2008 NTv2-grid. . Taking into account the limitations listed above, the rdtrans2008 NTv2-grid and naptrans2008 VDatum-grid can be used as an alternative to RDNAPTRANS™2008 to transform geographic ETRS89-coordinates to projected RD-coordinates with grid correction applied and NAP-heights. . Note that, although the resulting RD/NAP and ETRS89 coordinates from the transformation will be correct, geographic Bessel-1841 coordinates will differ in both procedures and should only be considered as an intermediate result. . RDNAPTRANS™2018 contains a new datum transformation based on the updated ETRS89 coordinates of realisation ETRF2000(R14). Next to this, a new and slightly more precise quasi-geoid grid model is used. This NLGEO2018 quasi-geoid model covers a larger area including a large part of the North Sea. A change with big impact is the use of a new data format of the grid files and a corresponding transformation procedure that changes the order of the steps of the transformation and uses a fixed height in the datum transformation. As a result, the transformation is now possible conform a de facto standard by including the datum transformation in the correction grid (variant 2). This allows straightforward implementation in software like GIS packages and can resolve current problems due to incorrect implementations of the transformation. . Within the administrative borders of the Netherlands, the differences in the resulting horizontal coordinates due to the changes from version 2008 to 2018 of RDNAPTRANS™ are at maximum 0.010 m at sea level (zero NAP height), and at maximum an additional 0.001 m per 50 m height above or below zero NAP height. The maximum change in the transformed height coordinates due to the slightly more precise new quasi-geoid grid model is about 0.025 m. The new correction grid has a different sampling in ellipsoidal coordinates. With this resampling, discontinuities in the correction grid are smoothed, especially outside the administrative borders of the Netherlands, to allow bilinear interpolation. As a result, changes in the resulting horizontal coordinates up to 0.05 m occur occasionally in Belgium, Germany and the Dutch EEZ. To use the same bounding box around the Netherlands including the Dutch EEZ of the North Sea of the quasi-geoid grid model for the correction grid, the correction grid has been faded out to zero correction for a seamless land-sea transition. This introduces latitude and longitude corrections up to 0.25 m in areas outside the former validity area of RDNAPTRANS™ where no corrections were defined before. . There are two variants for the implementation of RDNAPTRANS™2018. Implementation variant 1 applies the datum transformation as a separate step using a 3D similarity transformation. Implementation variant 2 includes the datum transformation in the correction grid and a different quasi-geoid grid for the height transformation is used. The advantage of implementation variant 1 is that it has no strict bounds for the area where horizontal coordinates can be transformed correctly. The disadvantage is that many software packages do not support implementation variant 1. Implementation variant 2 is supported by more software but can only be used within the bounds of the correction grid. The difference in the resulting coordinates between the two variants is well below 0.0010 m within the bounds of the RDNAPTRANS™2008 grids. Although transformation at sea and even outside the grid bounds is possible, the scale factor of the map projection increases rapidly and also the precision of transformation back and forth deteriorates. There are bounds to the recommended use of RD and NAP at sea and outside the Netherlands.
PackageMaintainer	Debian GIS Project <pkg-grass-devel@lists.alioth.debian.org>
PackageName	proj-rdnap
PackageSection	non-free/science
PackageVersion	2008+2018-5
SHA-1	46F29A488B07F3D695A1FFF83BA45C0EB4497BF9
SHA-256	0EED8AE376E8BFFFCC9E562312702FDD4F8A755F419FC9A619FA4BA5D38015EE

Key	Value
FileSize	1348724
MD5	BE86E5C21118716DAEFEC79F15CEC770
PackageDescription	RDNAP grid correction files for PROJ.4 Kadaster and Rijkswaterstaat CIV, working together under the name RDNAP, developed RDNAPTRANS™2008, the precise and official transformation between ETRS89 and the dutch national horizontal and vertical coordinate reference systems the Stelsel van de Rijksdriehoeksmeting (RD) and the Normaal Amsterdams Peil (NAP). A ‘simplified’ procedure has been developed which uses a NTv2-grid for the transformation between ETRS89 and RD as well as a VDatum-grid for the transformation between ETRS89 and NAP. This ‘simplified’ procedure has the following limitations: . 1) The rdtrans2008 NTv2-grid can only give identical results to RDNAPTRANS™2008 within 1 millimeter at ground level onshore and at mean sea level offshore. The horizontal deviation is approximately 1 millimeter per 50 meter height difference from ground level or mean sea level. 2) An exception to 1) is the border of the RDNAPTRANS™2008 correction grid. Transformation results within cells of the rdtrans2008 NTv2-grid that are intersected by the border of the RDNAPTRANS™2008 correction grid can result in deviations of up to 20 centimeter. 3) The naptrans2008 VDatum-grid cannot be used to determine deflections of the vertical. For this the NLGEO2004 geoid model has to be used. 4) The naptrans2008 VDatum-grid is referenced to the Bessel-1841 ellipsoid and cannot be used stand-alone, it has to be used in combination with the rdtrans2008 NTv2-grid. . Taking into account the limitations listed above, the rdtrans2008 NTv2-grid and naptrans2008 VDatum-grid can be used as an alternative to RDNAPTRANS™2008 to transform geographic ETRS89-coordinates to projected RD-coordinates with grid correction applied and NAP-heights. . Note that, although the resulting RD/NAP and ETRS89 coordinates from the transformation will be correct, geographic Bessel-1841 coordinates will differ in both procedures and should only be considered as an intermediate result.
PackageMaintainer	Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
PackageName	proj-rdnap
PackageSection	non-free/science
PackageVersion	2008-4
SHA-1	D963B3C6A315621911BF2A5A8B97E29186AE0B2D
SHA-256	AEF95B2EB185BCFAE0AD2797BDA7E4559AE740A2949C339C66AF0A59B6061327

Key	Value
FileSize	4998032
MD5	1B848BD3DF3D67E36FC9572E4DF5DCD7
PackageDescription	RDNAP grid correction files for PROJ Kadaster and Rijkswaterstaat CIV, working together under the name RDNAP, developed RDNAPTRANS™2008, the precise and official transformation between ETRS89 and the dutch national horizontal and vertical coordinate reference systems the Stelsel van de Rijksdriehoeksmeting (RD) and the Normaal Amsterdams Peil (NAP). A ‘simplified’ procedure has been developed which uses a NTv2-grid for the transformation between ETRS89 and RD as well as a VDatum-grid for the transformation between ETRS89 and NAP. This ‘simplified’ procedure has the following limitations: . 1) The rdtrans2008 NTv2-grid can only give identical results to RDNAPTRANS™2008 within 1 millimeter at ground level onshore and at mean sea level offshore. The horizontal deviation is approximately 1 millimeter per 50 meter height difference from ground level or mean sea level. 2) An exception to 1) is the border of the RDNAPTRANS™2008 correction grid. Transformation results within cells of the rdtrans2008 NTv2-grid that are intersected by the border of the RDNAPTRANS™2008 correction grid can result in deviations of up to 20 centimeter. 3) The naptrans2008 VDatum-grid cannot be used to determine deflections of the vertical. For this the NLGEO2004 geoid model has to be used. 4) The naptrans2008 VDatum-grid is referenced to the Bessel-1841 ellipsoid and cannot be used stand-alone, it has to be used in combination with the rdtrans2008 NTv2-grid. . Taking into account the limitations listed above, the rdtrans2008 NTv2-grid and naptrans2008 VDatum-grid can be used as an alternative to RDNAPTRANS™2008 to transform geographic ETRS89-coordinates to projected RD-coordinates with grid correction applied and NAP-heights. . Note that, although the resulting RD/NAP and ETRS89 coordinates from the transformation will be correct, geographic Bessel-1841 coordinates will differ in both procedures and should only be considered as an intermediate result. . RDNAPTRANS™2018 contains a new datum transformation based on the updated ETRS89 coordinates of realisation ETRF2000(R14). Next to this, a new and slightly more precise quasi-geoid grid model is used. This NLGEO2018 quasi-geoid model covers a larger area including a large part of the North Sea. A change with big impact is the use of a new data format of the grid files and a corresponding transformation procedure that changes the order of the steps of the transformation and uses a fixed height in the datum transformation. As a result, the transformation is now possible conform a de facto standard by including the datum transformation in the correction grid (variant 2). This allows straightforward implementation in software like GIS packages and can resolve current problems due to incorrect implementations of the transformation. . Within the administrative borders of the Netherlands, the differences in the resulting horizontal coordinates due to the changes from version 2008 to 2018 of RDNAPTRANS™ are at maximum 0.010 m at sea level (zero NAP height), and at maximum an additional 0.001 m per 50 m height above or below zero NAP height. The maximum change in the transformed height coordinates due to the slightly more precise new quasi-geoid grid model is about 0.025 m. The new correction grid has a different sampling in ellipsoidal coordinates. With this resampling, discontinuities in the correction grid are smoothed, especially outside the administrative borders of the Netherlands, to allow bilinear interpolation. As a result, changes in the resulting horizontal coordinates up to 0.05 m occur occasionally in Belgium, Germany and the Dutch EEZ. To use the same bounding box around the Netherlands including the Dutch EEZ of the North Sea of the quasi-geoid grid model for the correction grid, the correction grid has been faded out to zero correction for a seamless land-sea transition. This introduces latitude and longitude corrections up to 0.25 m in areas outside the former validity area of RDNAPTRANS™ where no corrections were defined before. . There are two variants for the implementation of RDNAPTRANS™2018. Implementation variant 1 applies the datum transformation as a separate step using a 3D similarity transformation. Implementation variant 2 includes the datum transformation in the correction grid and a different quasi-geoid grid for the height transformation is used. The advantage of implementation variant 1 is that it has no strict bounds for the area where horizontal coordinates can be transformed correctly. The disadvantage is that many software packages do not support implementation variant 1. Implementation variant 2 is supported by more software but can only be used within the bounds of the correction grid. The difference in the resulting coordinates between the two variants is well below 0.0010 m within the bounds of the RDNAPTRANS™2008 grids. Although transformation at sea and even outside the grid bounds is possible, the scale factor of the map projection increases rapidly and also the precision of transformation back and forth deteriorates. There are bounds to the recommended use of RD and NAP at sea and outside the Netherlands.
PackageMaintainer	Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
PackageName	proj-rdnap
PackageSection	non-free/science
PackageVersion	2008+2018-5
SHA-1	FA28119CBA46C1BAF7A447528E35A738252020B9
SHA-256	0EE034671E3F27F64FFE06F0D808C514B1ADAA670A37044600716F7A9F365F26

Key	Value
FileSize	4981748
MD5	0F576CD0C9C424E5A126C807543D4FA3
PackageDescription	RDNAP grid correction files for PROJ Kadaster and Rijkswaterstaat CIV, working together under the name RDNAP, developed RDNAPTRANS™2008, the precise and official transformation between ETRS89 and the dutch national horizontal and vertical coordinate reference systems the Stelsel van de Rijksdriehoeksmeting (RD) and the Normaal Amsterdams Peil (NAP). A ‘simplified’ procedure has been developed which uses a NTv2-grid for the transformation between ETRS89 and RD as well as a VDatum-grid for the transformation between ETRS89 and NAP. This ‘simplified’ procedure has the following limitations: . 1) The rdtrans2008 NTv2-grid can only give identical results to RDNAPTRANS™2008 within 1 millimeter at ground level onshore and at mean sea level offshore. The horizontal deviation is approximately 1 millimeter per 50 meter height difference from ground level or mean sea level. 2) An exception to 1) is the border of the RDNAPTRANS™2008 correction grid. Transformation results within cells of the rdtrans2008 NTv2-grid that are intersected by the border of the RDNAPTRANS™2008 correction grid can result in deviations of up to 20 centimeter. 3) The naptrans2008 VDatum-grid cannot be used to determine deflections of the vertical. For this the NLGEO2004 geoid model has to be used. 4) The naptrans2008 VDatum-grid is referenced to the Bessel-1841 ellipsoid and cannot be used stand-alone, it has to be used in combination with the rdtrans2008 NTv2-grid. . Taking into account the limitations listed above, the rdtrans2008 NTv2-grid and naptrans2008 VDatum-grid can be used as an alternative to RDNAPTRANS™2008 to transform geographic ETRS89-coordinates to projected RD-coordinates with grid correction applied and NAP-heights. . Note that, although the resulting RD/NAP and ETRS89 coordinates from the transformation will be correct, geographic Bessel-1841 coordinates will differ in both procedures and should only be considered as an intermediate result. . RDNAPTRANS™2018 contains a new datum transformation based on the updated ETRS89 coordinates of realisation ETRF2000(R14). Next to this, a new and slightly more precise quasi-geoid grid model is used. This NLGEO2018 quasi-geoid model covers a larger area including a large part of the North Sea. A change with big impact is the use of a new data format of the grid files and a corresponding transformation procedure that changes the order of the steps of the transformation and uses a fixed height in the datum transformation. As a result, the transformation is now possible conform a de facto standard by including the datum transformation in the correction grid (variant 2). This allows straightforward implementation in software like GIS packages and can resolve current problems due to incorrect implementations of the transformation. . Within the administrative borders of the Netherlands, the differences in the resulting horizontal coordinates due to the changes from version 2008 to 2018 of RDNAPTRANS™ are at maximum 0.010 m at sea level (zero NAP height), and at maximum an additional 0.001 m per 50 m height above or below zero NAP height. The maximum change in the transformed height coordinates due to the slightly more precise new quasi-geoid grid model is about 0.025 m. The new correction grid has a different sampling in ellipsoidal coordinates. With this resampling, discontinuities in the correction grid are smoothed, especially outside the administrative borders of the Netherlands, to allow bilinear interpolation. As a result, changes in the resulting horizontal coordinates up to 0.05 m occur occasionally in Belgium, Germany and the Dutch EEZ. To use the same bounding box around the Netherlands including the Dutch EEZ of the North Sea of the quasi-geoid grid model for the correction grid, the correction grid has been faded out to zero correction for a seamless land-sea transition. This introduces latitude and longitude corrections up to 0.25 m in areas outside the former validity area of RDNAPTRANS™ where no corrections were defined before. . There are two variants for the implementation of RDNAPTRANS™2018. Implementation variant 1 applies the datum transformation as a separate step using a 3D similarity transformation. Implementation variant 2 includes the datum transformation in the correction grid and a different quasi-geoid grid for the height transformation is used. The advantage of implementation variant 1 is that it has no strict bounds for the area where horizontal coordinates can be transformed correctly. The disadvantage is that many software packages do not support implementation variant 1. Implementation variant 2 is supported by more software but can only be used within the bounds of the correction grid. The difference in the resulting coordinates between the two variants is well below 0.0010 m within the bounds of the RDNAPTRANS™2008 grids. Although transformation at sea and even outside the grid bounds is possible, the scale factor of the map projection increases rapidly and also the precision of transformation back and forth deteriorates. There are bounds to the recommended use of RD and NAP at sea and outside the Netherlands.
PackageMaintainer	Debian GIS Project <pkg-grass-devel@lists.alioth.debian.org>
PackageName	proj-rdnap
PackageSection	non-free/science
PackageVersion	2008+2018-3~bpo10+1
SHA-1	5D041D2B564AD5D9549C8FDB861138A56CDD9A6D
SHA-256	5ECF90A58EB3045D338A5C53B2EBD7F694F3FB0829131E09E5FBE6BAA86047F0

Key	Value
FileSize	1317824
MD5	C95D189B8BFDA11754A1F2B4B7E19D9D
PackageDescription	RDNAP grid correction files for PROJ Kadaster and Rijkswaterstaat CIV, working together under the name RDNAP, developed RDNAPTRANS™2008, the precise and official transformation between ETRS89 and the dutch national horizontal and vertical coordinate reference systems the Stelsel van de Rijksdriehoeksmeting (RD) and the Normaal Amsterdams Peil (NAP). A ‘simplified’ procedure has been developed which uses a NTv2-grid for the transformation between ETRS89 and RD as well as a VDatum-grid for the transformation between ETRS89 and NAP. This ‘simplified’ procedure has the following limitations: . 1) The rdtrans2008 NTv2-grid can only give identical results to RDNAPTRANS™2008 within 1 millimeter at ground level onshore and at mean sea level offshore. The horizontal deviation is approximately 1 millimeter per 50 meter height difference from ground level or mean sea level. 2) An exception to 1) is the border of the RDNAPTRANS™2008 correction grid. Transformation results within cells of the rdtrans2008 NTv2-grid that are intersected by the border of the RDNAPTRANS™2008 correction grid can result in deviations of up to 20 centimeter. 3) The naptrans2008 VDatum-grid cannot be used to determine deflections of the vertical. For this the NLGEO2004 geoid model has to be used. 4) The naptrans2008 VDatum-grid is referenced to the Bessel-1841 ellipsoid and cannot be used stand-alone, it has to be used in combination with the rdtrans2008 NTv2-grid. . Taking into account the limitations listed above, the rdtrans2008 NTv2-grid and naptrans2008 VDatum-grid can be used as an alternative to RDNAPTRANS™2008 to transform geographic ETRS89-coordinates to projected RD-coordinates with grid correction applied and NAP-heights. . Note that, although the resulting RD/NAP and ETRS89 coordinates from the transformation will be correct, geographic Bessel-1841 coordinates will differ in both procedures and should only be considered as an intermediate result.
PackageMaintainer	Debian GIS Project <pkg-grass-devel@lists.alioth.debian.org>
PackageName	proj-rdnap
PackageSection	non-free/science
PackageVersion	2008-8
SHA-1	7B94BE0EE1C426D1490EC0C66CB25B2D039EC33B
SHA-256	173B5BCE0BC0EB837370B9BF418DE92E70489E724BFB62EECDAAC491851E6C45

Key	Value
FileSize	1332716
MD5	603ED0C3A9B840228DCF7EC6E5A7C6ED
PackageDescription	RDNAP grid correction files for PROJ.4 Kadaster and Rijkswaterstaat CIV, working together under the name RDNAP, developed RDNAPTRANS™2008, the precise and official transformation between ETRS89 and the dutch national horizontal and vertical coordinate reference systems the Stelsel van de Rijksdriehoeksmeting (RD) and the Normaal Amsterdams Peil (NAP). A ‘simplified’ procedure has been developed which uses a NTv2-grid for the transformation between ETRS89 and RD as well as a VDatum-grid for the transformation between ETRS89 and NAP. This ‘simplified’ procedure has the following limitations: . 1) The rdtrans2008 NTv2-grid can only give identical results to RDNAPTRANS™2008 within 1 millimeter at ground level onshore and at mean sea level offshore. The horizontal deviation is approximately 1 millimeter per 50 meter height difference from ground level or mean sea level. 2) An exception to 1) is the border of the RDNAPTRANS™2008 correction grid. Transformation results within cells of the rdtrans2008 NTv2-grid that are intersected by the border of the RDNAPTRANS™2008 correction grid can result in deviations of up to 20 centimeter. 3) The naptrans2008 VDatum-grid cannot be used to determine deflections of the vertical. For this the NLGEO2004 geoid model has to be used. 4) The naptrans2008 VDatum-grid is referenced to the Bessel-1841 ellipsoid and cannot be used stand-alone, it has to be used in combination with the rdtrans2008 NTv2-grid. . Taking into account the limitations listed above, the rdtrans2008 NTv2-grid and naptrans2008 VDatum-grid can be used as an alternative to RDNAPTRANS™2008 to transform geographic ETRS89-coordinates to projected RD-coordinates with grid correction applied and NAP-heights. . Note that, although the resulting RD/NAP and ETRS89 coordinates from the transformation will be correct, geographic Bessel-1841 coordinates will differ in both procedures and should only be considered as an intermediate result.
PackageMaintainer	Debian GIS Project <pkg-grass-devel@lists.alioth.debian.org>
PackageName	proj-rdnap
PackageSection	non-free/science
PackageVersion	2008-6
SHA-1	F492BE6B87EB7EA293FA66E6AD21E0F037C79025
SHA-256	3CAB5DE8217BD44DA311453E6838754D971D461DF71BB3005AF2655957A03FA7