FD2BASIS - Revision history

Ak3gseis at 13:18, 10 October 2022

2022-10-10T13:18:36Z

← Older revision		Revision as of 13:18, 10 October 2022
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	\|add_software= -		\|add_software= -
	\|contact_original=G. Seiß		\|contact_original=G. Seiß
	\|contact_maintenance=[mailto:pre.proghome@baw.de ~~Group~~ PRE]		\|contact_maintenance=[mailto:pre.proghome@baw.de working group PRE]
	\|documentation=$PROGHOME/examples/fd2basis/*		\|documentation=$PROGHOME/examples/fd2basis/*
	}}		}}

Ak3gseis at 13:15, 10 October 2022

2022-10-10T13:15:42Z

← Older revision		Revision as of 13:15, 10 October 2022
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	\|name_de=FD2BASIS		\|name_de=FD2BASIS
	\|name=FD2BASIS		\|name=FD2BASIS
	\|version=~~December 2013~~		\|version=October 2021
	\|version_descr=December 2013		\|version_descr=December 2013
	\|catchwords=		\|catchwords=

Ak3gseis at 13:12, 10 October 2022

2022-10-10T13:12:40Z

← Older revision		Revision as of 13:12, 10 October 2022
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	* Coordinates of raw data files are now transformed to a user defined coordinate reference systen (CRS) if necessary. To support this feature, the user must include a magic comment with the content "C CRS=xxxxx" at the beginning of the file. Here "xxxxx" stands for the EPSG code of the CRS. Additionally the user has to set the environment variable BAWCRS to a valid CRS. All Input files of type topo.bin must be realized in this user CRS.		* Coordinates of raw data files are now transformed to a user defined coordinate reference systen (CRS) if necessary. To support this feature, the user must include a magic comment with the content "C CRS=xxxxx" at the beginning of the file. Here "xxxxx" stands for the EPSG code of the CRS. Additionally the user has to set the environment variable BAWCRS to a valid CRS. All Input files of type topo.bin must be realized in this user CRS.

	~~Supported~~ CRS are ~~documented~~ in [[GEOTRANSFORMER]]		Valid (supported) CRS are found in the description [[GEOTRANSFORMER]].

	For the coordinate shift from DHDN/STN to ETRS89 the NTv2 method is used with the grid shift files, which are defined by environment variables NTV2GRID (DHDN) and NTV2STN (STN).		For the coordinate shift from DHDN/STN to ETRS89 the NTv2 method is used with the grid shift files, which are defined by environment variables NTV2GRID (DHDN) and NTV2STN (STN).

Ak3gseis at 13:01, 10 October 2022

2022-10-10T13:01:27Z

← Older revision		Revision as of 13:01, 10 October 2022
Line 31:		Line 31:
	* Coordinates of raw data files are now transformed to a user defined coordinate reference systen (CRS) if necessary. To support this feature, the user must include a magic comment with the content "C CRS=xxxxx" at the beginning of the file. Here "xxxxx" stands for the EPSG code of the CRS. Additionally the user has to set the environment variable BAWCRS to a valid CRS. All Input files of type topo.bin must be realized in this user CRS.		* Coordinates of raw data files are now transformed to a user defined coordinate reference systen (CRS) if necessary. To support this feature, the user must include a magic comment with the content "C CRS=xxxxx" at the beginning of the file. Here "xxxxx" stands for the EPSG code of the CRS. Additionally the user has to set the environment variable BAWCRS to a valid CRS. All Input files of type topo.bin must be realized in this user CRS.

			Supported CRS are documented in [[GEOTRANSFORMER]]

			For the coordinate shift from DHDN/STN to ETRS89 the NTv2 method is used with the grid shift files, which are defined by environment variables NTV2GRID (DHDN) and NTV2STN (STN).
	~~Supported EPSG codes are:~~
	* Gauss-Krueger 3 degree / DHDN: EPSG 31466-31469
	* Gauss-Krueger 3 degree / STN : EPSG 02398-02399
	* UTM / ETRS89 : EPSG 25831-25833
	* UTM / ED50 : EPSG 23031-23033
	* RD Amersfoort New : EPSG 28992
	* Geographic ETRS89 : EPSG 4258
	* Geographic WGS84 : EPSG 4326
	* Geographic ED 50 : EPSG 4230
	For the coordinate shift from DHDN/STN to ETRS89 the NTv2 method is used with the grid shift files, which are
	defined by NTV2GRID (DHDN) and NTV2STN (STN).

	\|preprocessor=		\|preprocessor=
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	\|language=Fortran2003		\|language=Fortran2003
	\|add_software= -		\|add_software= -
	\|contact_original=~~[mailto:guntram.seiss@baw.de~~ G. Seiß]		\|contact_original=G. Seiß
	\|contact_maintenance=[mailto:pre.proghome@baw.de Group PRE]		\|contact_maintenance=[mailto:pre.proghome@baw.de Group PRE]
	\|documentation=$PROGHOME/examples/fd2basis/*		\|documentation=$PROGHOME/examples/fd2basis/*
	}}		}}

Ak3gseis: Change contact_maintenance

2022-09-06T07:46:57Z

Change contact_maintenance

← Older revision		Revision as of 07:46, 6 September 2022
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	\|postprocessor=		\|postprocessor=
	[[FD2ADDTOPO]], [[FDGITTER05]]		[[FD2ADDTOPO]], [[FDGITTER05]]
	\|language=~~Fortran95~~		\|language=Fortran2003
	\|add_software= -		\|add_software= -
	\|contact_original=[mailto:guntram.seiss@baw.de G. Seiß]		\|contact_original=[mailto:guntram.seiss@baw.de G. Seiß]
	\|contact_maintenance=[mailto:~~guntram~~.~~seiss~~@baw.de ~~G. Seiß~~]		\|contact_maintenance=[mailto:pre.proghome@baw.de Group PRE]
	\|documentation=$PROGHOME/examples/fd2basis/*		\|documentation=$PROGHOME/examples/fd2basis/*
	}}		}}

imported>Seiss Guntram: Support of coordinate reference systems

2013-12-20T12:58:29Z

Support of coordinate reference systems

← Older revision		Revision as of 12:58, 20 December 2013
Line 2:		Line 2:
	\|name_de=FD2BASIS		\|name_de=FD2BASIS
	\|name=FD2BASIS		\|name=FD2BASIS
	\|version=~~April 1998~~		\|version=December 2013
	\|version_descr=~~April 1998~~		\|version_descr=December 2013
	\|catchwords=		\|catchwords=
	finite differences methods<br />		finite differences methods<br />
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	* The structures can be stored as parts and there is no need of sorting before using this program. The only constraint is that they must in total represent closed structures (islands) or their beginning and ending shall both lie outside the grid area. Holes in a boundary can lead to unwanted results!		* The structures can be stored as parts and there is no need of sorting before using this program. The only constraint is that they must in total represent closed structures (islands) or their beginning and ending shall both lie outside the grid area. Holes in a boundary can lead to unwanted results!
	* A structure which contains only one point is ignored. Double points following each other are used like one point.		* A structure which contains only one point is ignored. Double points following each other are used like one point.
	* A '''manual postprocessing''' can be neccessary for thin areas of water or land (land connections, small channels) if resolution of the grid is not high enough to resolve theese structures.		* A '''manual postprocessing''' can be neccessary for thin areas of water or land (land connections, small channels) if resolution of the grid is not high enough to resolve theese structures.
			* Coordinates of raw data files are now transformed to a user defined coordinate reference systen (CRS) if necessary. To support this feature, the user must include a magic comment with the content "C CRS=xxxxx" at the beginning of the file. Here "xxxxx" stands for the EPSG code of the CRS. Additionally the user has to set the environment variable BAWCRS to a valid CRS. All Input files of type topo.bin must be realized in this user CRS.



			Supported EPSG codes are:
			* Gauss-Krueger 3 degree / DHDN: EPSG 31466-31469
			* Gauss-Krueger 3 degree / STN : EPSG 02398-02399
			* UTM / ETRS89 : EPSG 25831-25833
			* UTM / ED50 : EPSG 23031-23033
			* RD Amersfoort New : EPSG 28992
			* Geographic ETRS89 : EPSG 4258
			* Geographic WGS84 : EPSG 4326
			* Geographic ED 50 : EPSG 4230
			For the coordinate shift from DHDN/STN to ETRS89 the NTv2 method is used with the grid shift files, which are
			defined by NTV2GRID (DHDN) and NTV2STN (STN).

	\|preprocessor=		\|preprocessor=
	digitizer program (PC)		digitizer program (PC), GISMO
	\|postprocessor=		\|postprocessor=
	[[FD2ADDTOPO]], [[FDGITTER05]]		[[FD2ADDTOPO]], [[FDGITTER05]]
	\|language=~~Fortran90~~		\|language=Fortran95
	\|add_software= -		\|add_software= -
	\|contact_original=[mailto:guntram.seiss@baw.de G. Seiß]		\|contact_original=[mailto:guntram.seiss@baw.de G. Seiß]

imported>BAWiki 1: Created page with '{{ProgramDescription |name_de=FD2BASIS |name=FD2BASIS |version=April 1998 |version_descr=April 1998 |catchwords= finite differences methods
grid generation
distribu…'

2010-05-12T11:45:51Z

Created page with '{{ProgramDescription |name_de=FD2BASIS |name=FD2BASIS |version=April 1998 |version_descr=April 1998 |catchwords= finite differences methods grid generation distribu…'

New page

{{ProgramDescription
|name_de=FD2BASIS
|name=FD2BASIS
|version=April 1998
|version_descr=April 1998
|catchwords=
finite differences methods 
grid generation 
distribution of land and water 
|shortdescription=
The program FD2BASIS generates a FIDISOR/FIDIRB grid with correct distribution of land and water areas. The latter is constructed from digitized boundary structure lines like the high water boundary ( simulations of normal tidal situations) or dike line (for storm surge simulations).
|inputfiles=
# input control file (type [[FD2BASIS.DAT|fd2basis.dat]])
# one or more files with digitized boundary structures (type [[DIGI.GKK|digi.gkk]])
|outputfiles=
# basic FIDISOR/FIDIRB grid (type [[TOPO.BIN|topo.bin]])
# file randpkte.dat with boundary cell indices and the intersecting polygon part (is used internally for boundary fit).
# buffer files liste_1.dat and liste_2.dat
# printer file fd2basis.sdr
# (optional) trace file fd2basis.trc
|methodology=
First a matrix IPOLY is allocated with given grid dimension which contains 0 overall. Then all cells which are touched by the given boundary structures are set to the values 99 or 98 (fix point or interpolated point respectively). Now land is initialized with -99, beginning with the landpoints given by the user. If a cell is reached, which has a value different from 0 the search continues in another main direction or at the next landpoint. All initialized land cells become starting points itself. For purpose of memory saving parts of the starting points are buffered on disk.

Last step is the correction of the boundary points. If the area of land inside the cell is greater than that of water, the cell is set to land. The area is calculated from the intersection polygon, which was stored in randpkte.dat.

'''Remarks''':

* The structures can be stored as parts and there is no need of sorting before using this program. The only constraint is that they must in total represent closed structures (islands) or their beginning and ending shall both lie outside the grid area. Holes in a boundary can lead to unwanted results!
* A structure which contains only one point is ignored. Double points following each other are used like one point.
* A '''manual postprocessing''' can be neccessary for thin areas of water or land (land connections, small channels) if resolution of the grid is not high enough to resolve theese structures.
|preprocessor=
digitizer program (PC)
|postprocessor=
[[FD2ADDTOPO]], [[FDGITTER05]]
|language=Fortran90
|add_software= -
|contact_original=[mailto:guntram.seiss@baw.de G. Seiß]
|contact_maintenance=[mailto:guntram.seiss@baw.de G. Seiß]
|documentation=$PROGHOME/examples/fd2basis/*
}}