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gm.mli
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gm.mli
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(*
* Google Maps utilities
*
* Copyright (C) 2004 CENA/ENAC, Pascal Brisset
*
* This file is part of paparazzi.
*
* paparazzi is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* paparazzi is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with paparazzi; see the file COPYING. If not, write to
* the Free Software Foundation, 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
*)
val tile_size : int * int
val zoom_max : int
val zoom_min : int
val tile_coverage : float -> int -> float * float
(** [tile_coverage wgs84_lat zoom] Returns (width,height) *)
type tile_t = {
key : string; (* [qrst] string *)
sw_corner : Latlong.geographic;
width : float; (* Longitude difference *)
height : float (* Latitude difference *)
}
type maps_source = Google | OSM | MS | MQ | MQ_Aerial
val string_of_maps_source : maps_source -> string
val maps_sources : maps_source list
val set_maps_source : maps_source -> unit
val get_maps_source : unit -> maps_source
(** Initialized to Google *)
val tile_of_geo : ?level:int -> Latlong.geographic -> int -> tile_t
(** [tile_string geo zoom] Returns the tile description containing a
given point with a the smallest available zoom greater or equal to [zoom]. *)
val tile_of_key : string -> tile_t
(** [tile_of_key google_maps_tile_key] Returns tile description of a
named tile. *)
val cache_path : string ref
type policy = CacheOrHttp | NoHttp | NoCache
val string_of_policy : policy -> string
val policies : policy list
val set_policy : policy -> unit
val get_policy : unit -> policy
(** Initialized to CacheOrHttp using cache and http access *)
exception Not_available
type hashtbl_cache = (string, string)Hashtbl.t
val get_hashtbl_of_cache : unit -> hashtbl_cache
val get_image : ?tbl:hashtbl_cache -> string -> tile_t * string
(** [get_image key] Returns the tile description and the image file name.
May raise [Not_available] *)
val get_tile : Latlong.geographic -> int -> tile_t*string
(** [get_tile geo zoom] May raise [Not_available] *)