/
GeoTiff.scala
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/
GeoTiff.scala
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/*
* Copyright 2016 Azavea
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package geotrellis.raster.io.geotiff
import geotrellis.raster._
import geotrellis.raster.io.geotiff.reader.GeoTiffReader
import geotrellis.raster.io.geotiff.writer.GeoTiffWriter
import geotrellis.vector.{Extent, ProjectedExtent}
import geotrellis.proj4.CRS
/**
* Holds information on how the data is represented, projected, and any user
* defined tags.
*/
trait GeoTiffData {
val cellType: CellType
def imageData: GeoTiffImageData
def extent: Extent
def crs: CRS
def tags: Tags
def options: GeoTiffOptions
def pixelSampleType: Option[PixelSampleType] =
tags.headTags.get(Tags.AREA_OR_POINT).flatMap { aop =>
aop match {
case "AREA" => Some(PixelIsArea)
case "POINT" => Some(PixelIsPoint)
case _ => None
}
}
}
/**
* Base trait of GeoTiff. Takes a tile that is of a type equal to or a subtype
* of CellGrid
*/
trait GeoTiff[T <: CellGrid] extends GeoTiffData {
def tile: T
def projectedExtent: ProjectedExtent = ProjectedExtent(extent, crs)
def projectedRaster: ProjectedRaster[T] = ProjectedRaster(tile, extent, crs)
def raster: Raster[T] = Raster(tile, extent)
def rasterExtent: RasterExtent = RasterExtent(extent, tile.cols, tile.rows)
def mapTile(f: T => T): GeoTiff[T]
def write(path: String): Unit =
GeoTiffWriter.write(this, path)
def toByteArray: Array[Byte] =
GeoTiffWriter.write(this)
}
/**
* Companion object to GeoTiff
*/
object GeoTiff {
def readMultiband(path: String): MultibandGeoTiff =
MultibandGeoTiff(path)
def readSingleband(path: String): SinglebandGeoTiff =
SinglebandGeoTiff(path)
def apply(path: String): Either[SinglebandGeoTiff, MultibandGeoTiff] = {
val multiband = MultibandGeoTiff(path)
if (multiband.tile.bandCount == 1) {
Left(SinglebandGeoTiff(path))
} else {
Right(multiband)
}
}
def apply(tile: Tile, extent: Extent, crs: CRS): SinglebandGeoTiff =
SinglebandGeoTiff(tile, extent, crs)
def apply(raster: SinglebandRaster, crs: CRS): SinglebandGeoTiff =
apply(raster.tile, raster.extent, crs)
def apply(tile: MultibandTile, extent: Extent, crs: CRS): MultibandGeoTiff =
MultibandGeoTiff(tile, extent, crs)
def apply(raster: MultibandRaster, crs: CRS): MultibandGeoTiff =
apply(raster.tile, raster.extent, crs)
}