com.graphhopper.reader.dem

Class AbstractElevationProvider

java.lang.Object

com.graphhopper.reader.dem.AbstractElevationProvider

All Implemented Interfaces:

ElevationProvider

Direct Known Subclasses:

AbstractSRTMElevationProvider, AbstractTiffElevationProvider

public abstract class AbstractElevationProvider
extends Object
implements ElevationProvider

Provides basic methods that are usually used in an ElevationProvider.

Author:

Robin Boldt

Field Summary

Fields inherited from interface com.graphhopper.reader.dem.ElevationProvider

NOOP

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AbstractElevationProvider(String cacheDirString)

Method Summary

Modifier and Type	Method and Description
protected File	getCacheDir()
protected Directory	getDirectory()
void	setAutoRemoveTemporaryFiles(boolean autoRemoveTemporary) Creating temporary files can take a long time as we need to unpack them as well as to fill our DataAccess object, so this option can be used to disable the default clear mechanism via specifying 'false'.
ElevationProvider	setBaseURL(String baseUrl) Specifies the service URL where to download the elevation data.
ElevationProvider	setDAType(DAType daType) Set to true if you have a small area and need high speed access.
void	setDownloader(Downloader downloader)
void	setInterpolate(boolean interpolate) Configuration option to use bilinear interpolation to find the elevation at a point from the surrounding elevation points.

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.graphhopper.reader.dem.ElevationProvider

getEle, release

Constructor Detail

AbstractElevationProvider

protected AbstractElevationProvider(String cacheDirString)

Method Detail

setInterpolate

public void setInterpolate(boolean interpolate)

Description copied from interface: ElevationProvider

Configuration option to use bilinear interpolation to find the elevation at a point from the surrounding elevation points. Has only an effect if called before the first getEle call. Turned off by default.

Specified by:

setInterpolate in interface ElevationProvider

setAutoRemoveTemporaryFiles

public void setAutoRemoveTemporaryFiles(boolean autoRemoveTemporary)

Description copied from interface: ElevationProvider

Creating temporary files can take a long time as we need to unpack them as well as to fill our DataAccess object, so this option can be used to disable the default clear mechanism via specifying 'false'.

Specified by:

setAutoRemoveTemporaryFiles in interface ElevationProvider

setDownloader

public void setDownloader(Downloader downloader)

getCacheDir

protected File getCacheDir()

setBaseURL

public ElevationProvider setBaseURL(String baseUrl)

Description copied from interface: ElevationProvider

Specifies the service URL where to download the elevation data. An empty string should set it to the default URL. Default is a provider-dependent URL which should work out of the box.

Specified by:

setBaseURL in interface ElevationProvider

setDAType

public ElevationProvider setDAType(DAType daType)

Description copied from interface: ElevationProvider

Set to true if you have a small area and need high speed access. Default is DAType.MMAP

Specified by:

setDAType in interface ElevationProvider

getDirectory

protected Directory getDirectory()