visad.data.gis
Class DemFamily

java.lang.Object
  visad.data.FormNode
      visad.data.FormFamily
          visad.data.FunctionFormFamily
              visad.data.gis.DemFamily

All Implemented Interfaces:

FormFileInformer

public class DemFamily
extends FunctionFormFamily
implements FormFileInformer

A container for all the supported DEM types. Currently, USGS DEM and Arc ASCIIGRID formats are supported. To read a Data object from a file or URL:

    Data data = new DemFamily("dems").open(string);
 

Version:

$Revision: 1.6 $ $Date: 2009-03-02 23:35:48 $

Author:

Don Murray

See Also:

UsgsDemForm, ArcAsciiGridForm

Field Summary

Fields inherited from class visad.data.FormFamily

forms

Constructor Summary

DemFamily(String name)
Construct a family of the supported map datatype Forms

DemFamily(String name, MathType dataFormat)
Construct a family of the supported map datatype Forms

Method Summary

static void	addFormToList(FormNode form) Add to the family of the supported map datatype Forms
String[]	getDefaultSuffixes() Get a list of default suffixes for McIDAS map files
boolean	isThisType(byte[] block) Determines if this is a USGS DEM file from the starting block
boolean	isThisType(String name) Determines if this is a DEM file from the name
static void	main(String[] args) Test the DemFamily class run java visad.data.gis.DemFamily dem1 dem2 ... demn
DataImpl	open(String id) Open a local data object using the first appropriate map form.
DataImpl	open(URL url) Open a remote data object using the first appropriate map form.

Methods inherited from class visad.data.FunctionFormFamily

add, save

Methods inherited from class visad.data.FormFamily

addFormNode, getForms

Methods inherited from class visad.data.FormNode

getName

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DemFamily

public DemFamily(String name)

Construct a family of the supported map datatype Forms

Parameters:

name - name of the family

DemFamily

public DemFamily(String name,
                 MathType dataFormat)

Construct a family of the supported map datatype Forms

Parameters:

name - name of the family

Method Detail

addFormToList

public static void addFormToList(FormNode form)
                          throws ArrayIndexOutOfBoundsException

Add to the family of the supported map datatype Forms

Parameters:

form - FormNode to add to the list

Throws:

ArrayIndexOutOfBoundsException - If there is no more room in the list.

isThisType

public boolean isThisType(String name)

Determines if this is a DEM file from the name

Specified by:

isThisType in interface FormFileInformer

Parameters:

name - name of the file

Returns:

true if it matches the pattern for USGS DEM files

isThisType

public boolean isThisType(byte[] block)

Determines if this is a USGS DEM file from the starting block

Specified by:

isThisType in interface FormFileInformer

Parameters:

block - block of data to check

Returns:

false - there is no identifying block in a USGS DEM file

getDefaultSuffixes

public String[] getDefaultSuffixes()

Get a list of default suffixes for McIDAS map files

Specified by:

getDefaultSuffixes in interface FormFileInformer

Returns:

valid list of suffixes

open

public DataImpl open(String id)
              throws BadFormException,
                     VisADException

Open a local data object using the first appropriate map form.

Overrides:

open in class FunctionFormFamily

Parameters:

id - String representing the path of the map file

Throws:

BadFormException - - no form is appropriate

VisADException - - VisAD error

open

public DataImpl open(URL url)
              throws BadFormException,
                     VisADException,
                     IOException

Open a remote data object using the first appropriate map form.

Overrides:

open in class FunctionFormFamily

Parameters:

url - URL representing the location of the map file

Throws:

BadFormException - - no form is appropriate

VisADException - - VisAD error

IOException - - file not found

main

public static void main(String[] args)
                 throws BadFormException,
                        IOException,
                        RemoteException,
                        VisADException

Test the DemFamily class run java visad.data.gis.DemFamily dem1 dem2 ... demn

Throws:

BadFormException

IOException

RemoteException

VisADException