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/*
* Copyright 2022 The Android Open Source Project
*
* 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.
*/
syntax = "proto2";
package com.android.internal.location.altitude;
option java_package = "com.android.internal.location.altitude";
option java_multiple_files = true;
// Defines parameters for a spherically projected geoid map and corresponding
// tile management.
message MapParamsProto {
// Defines the resolution of the map in terms of an S2 level.
optional int32 map_s2_level = 1;
// Defines the resolution of the tiles in cache in terms of an S2 level.
optional int32 cache_tile_s2_level = 2;
// Defines the resolution of the tiles on disk in terms of an S2 level.
optional int32 disk_tile_s2_level = 3;
// Defines the `a` coefficient in the expression `a * map_value + b` used to
// calculate a geoid height in meters.
optional double model_a_meters = 4;
// Defines the `b` coefficient in the expression `a * map_value + b` used to
// calculate a geoid height in meters.
optional double model_b_meters = 5;
// Defines the root mean square error in meters of the geoid height.
optional double model_rmse_meters = 6;
}
// A single tile associating values in the unit interval [0, 1] to map cells.
message S2TileProto {
// The S2 token associated with the common parent of all map cells in this
// tile.
optional string tile_key = 1;
// Encoded data that merge into a value in the unit interval [0, 1] for each
// map cell in this tile.
optional bytes byte_buffer = 2;
optional bytes byte_jpeg = 3;
optional bytes byte_png = 4;
}
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