com.graphhopper.reader.dem

Interface ElevationProvider

All Known Implementing Classes:

AbstractElevationProvider, AbstractSRTMElevationProvider, AbstractTiffElevationProvider, CGIARProvider, GMTEDProvider, MultiSourceElevationProvider, SkadiProvider, SRTMGL1Provider, SRTMProvider

public interface ElevationProvider

Author:

Peter Karich

Field Summary

Fields

Modifier and Type	Field and Description
static ElevationProvider	NOOP

Method Summary

Modifier and Type	Method and Description
double	getEle(double lat, double lon)
void	release() Release resources.
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	setInterpolate(boolean interpolate) Configuration option to use bilinear interpolation to find the elevation at a point from the surrounding elevation points.

Field Detail

NOOP

static final ElevationProvider NOOP

Method Detail

getEle

double getEle(double lat,
              double lon)

Returns:

returns the height in meters or Double.NaN if invalid

setBaseURL

ElevationProvider setBaseURL(String baseURL)

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.

setDAType

ElevationProvider setDAType(DAType daType)

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

setInterpolate

void setInterpolate(boolean interpolate)

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.

release

void release()

Release resources.

setAutoRemoveTemporaryFiles

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'.