geotrellis.engine.RasterLayerBuilder.scala Maven / Gradle / Ivy

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GeoTrellis is an open source geographic data processing engine for high performance applications.

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/*
 * Copyright (c) 2014 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.engine

import geotrellis.raster._
import geotrellis.vector.Extent

import com.typesafe.config.Config

/**
 * Defines a RasterLayerBuilder that can be used to add raster layer types
 * to GeoTrellis. Also provides some baseline helper functions for getting
 * Information out of the metadata json files.
 */
@deprecated("geotrellis-engine has been deprecated", "Geotrellis Version 0.10")
trait RasterLayerBuilder {
  def apply(path: String, json: Config): RasterLayer =
    apply(None, path, json)

  def apply(ds: Option[String], path: String, json: Config): RasterLayer

  def getName(json: Config) = json.getString("layer")

  def getExtent(json: Config) = {
    val xmin = json.getDouble("xmin")
    val ymin = json.getDouble("ymin")
    val xmax = json.getDouble("xmax")
    val ymax = json.getDouble("ymax")
    Extent(xmin, ymin, xmax, ymax)
  }

  def getCellWidthAndHeight(json: Config): (Double, Double) = {
    val cellWidth = json.getDouble("cellwidth")
    val cellHeight = json.getDouble("cellheight")
    (cellWidth, cellHeight)
  }

  def getEpsg(json: Config) =
    if(json.hasPath("epsg")) {
      json.getInt("epsg")
    } else {
      3785
    }

  def getXskew(json: Config) =
    if(json.hasPath("xskew")) {
      json.getDouble("xskew")
    } else {
      0.0
    }

  def getYskew(json: Config) =
    if(json.hasPath("yskew")) {
      json.getDouble("yskew")
    } else {
      0.0
    }

  def getCellType(json: Config): CellType = {
    parseType(json.getString("datatype"))
  }

  def getCacheFlag(json: Config): Boolean =
    if(json.hasPath("cache")) {
      json.getBoolean("cache")
    } else {
      false
    }

  def parseType(s: String): CellType = s match {
    case "bool" => BitCellType
    case "int8" => ByteConstantNoDataCellType
    case "int16" => ShortConstantNoDataCellType
    case "int32" => IntConstantNoDataCellType
    case "float32" => FloatConstantNoDataCellType
    case "float64" => DoubleConstantNoDataCellType
    case s => sys.error(s"unsupported datatype '$s'")
  }
}