Skip to content

Instantly share code, notes, and snippets.

@yofukami
Forked from hfu/LICENSE
Last active May 22, 2016 03:59
Show Gist options
  • Save yofukami/c23efdbf52ec2b704a8153454325dfa2 to your computer and use it in GitHub Desktop.
Save yofukami/c23efdbf52ec2b704a8153454325dfa2 to your computer and use it in GitHub Desktop.
ジオ+ウェブの標準化、最近の進捗
CC0 1.0 Universal
Statement of Purpose
The laws of most jurisdictions throughout the world automatically confer
exclusive Copyright and Related Rights (defined below) upon the creator and
subsequent owner(s) (each and all, an "owner") of an original work of
authorship and/or a database (each, a "Work").
Certain owners wish to permanently relinquish those rights to a Work for the
purpose of contributing to a commons of creative, cultural and scientific
works ("Commons") that the public can reliably and without fear of later
claims of infringement build upon, modify, incorporate in other works, reuse
and redistribute as freely as possible in any form whatsoever and for any
purposes, including without limitation commercial purposes. These owners may
contribute to the Commons to promote the ideal of a free culture and the
further production of creative, cultural and scientific works, or to gain
reputation or greater distribution for their Work in part through the use and
efforts of others.
For these and/or other purposes and motivations, and without any expectation
of additional consideration or compensation, the person associating CC0 with a
Work (the "Affirmer"), to the extent that he or she is an owner of Copyright
and Related Rights in the Work, voluntarily elects to apply CC0 to the Work
and publicly distribute the Work under its terms, with knowledge of his or her
Copyright and Related Rights in the Work and the meaning and intended legal
effect of CC0 on those rights.
1. Copyright and Related Rights. A Work made available under CC0 may be
protected by copyright and related or neighboring rights ("Copyright and
Related Rights"). Copyright and Related Rights include, but are not limited
to, the following:
i. the right to reproduce, adapt, distribute, perform, display, communicate,
and translate a Work;
ii. moral rights retained by the original author(s) and/or performer(s);
iii. publicity and privacy rights pertaining to a person's image or likeness
depicted in a Work;
iv. rights protecting against unfair competition in regards to a Work,
subject to the limitations in paragraph 4(a), below;
v. rights protecting the extraction, dissemination, use and reuse of data in
a Work;
vi. database rights (such as those arising under Directive 96/9/EC of the
European Parliament and of the Council of 11 March 1996 on the legal
protection of databases, and under any national implementation thereof,
including any amended or successor version of such directive); and
vii. other similar, equivalent or corresponding rights throughout the world
based on applicable law or treaty, and any national implementations thereof.
2. Waiver. To the greatest extent permitted by, but not in contravention of,
applicable law, Affirmer hereby overtly, fully, permanently, irrevocably and
unconditionally waives, abandons, and surrenders all of Affirmer's Copyright
and Related Rights and associated claims and causes of action, whether now
known or unknown (including existing as well as future claims and causes of
action), in the Work (i) in all territories worldwide, (ii) for the maximum
duration provided by applicable law or treaty (including future time
extensions), (iii) in any current or future medium and for any number of
copies, and (iv) for any purpose whatsoever, including without limitation
commercial, advertising or promotional purposes (the "Waiver"). Affirmer makes
the Waiver for the benefit of each member of the public at large and to the
detriment of Affirmer's heirs and successors, fully intending that such Waiver
shall not be subject to revocation, rescission, cancellation, termination, or
any other legal or equitable action to disrupt the quiet enjoyment of the Work
by the public as contemplated by Affirmer's express Statement of Purpose.
3. Public License Fallback. Should any part of the Waiver for any reason be
judged legally invalid or ineffective under applicable law, then the Waiver
shall be preserved to the maximum extent permitted taking into account
Affirmer's express Statement of Purpose. In addition, to the extent the Waiver
is so judged Affirmer hereby grants to each affected person a royalty-free,
non transferable, non sublicensable, non exclusive, irrevocable and
unconditional license to exercise Affirmer's Copyright and Related Rights in
the Work (i) in all territories worldwide, (ii) for the maximum duration
provided by applicable law or treaty (including future time extensions), (iii)
in any current or future medium and for any number of copies, and (iv) for any
purpose whatsoever, including without limitation commercial, advertising or
promotional purposes (the "License"). The License shall be deemed effective as
of the date CC0 was applied by Affirmer to the Work. Should any part of the
License for any reason be judged legally invalid or ineffective under
applicable law, such partial invalidity or ineffectiveness shall not
invalidate the remainder of the License, and in such case Affirmer hereby
affirms that he or she will not (i) exercise any of his or her remaining
Copyright and Related Rights in the Work or (ii) assert any associated claims
and causes of action with respect to the Work, in either case contrary to
Affirmer's express Statement of Purpose.
4. Limitations and Disclaimers.
a. No trademark or patent rights held by Affirmer are waived, abandoned,
surrendered, licensed or otherwise affected by this document.
b. Affirmer offers the Work as-is and makes no representations or warranties
of any kind concerning the Work, express, implied, statutory or otherwise,
including without limitation warranties of title, merchantability, fitness
for a particular purpose, non infringement, or the absence of latent or
other defects, accuracy, or the present or absence of errors, whether or not
discoverable, all to the greatest extent permissible under applicable law.
c. Affirmer disclaims responsibility for clearing rights of other persons
that may apply to the Work or any use thereof, including without limitation
any person's Copyright and Related Rights in the Work. Further, Affirmer
disclaims responsibility for obtaining any necessary consents, permissions
or other rights required for any use of the Work.
d. Affirmer understands and acknowledges that Creative Commons is not a
party to this document and has no duty or obligation with respect to this
CC0 or use of the Work.
For more information, please see
<http://creativecommons.org/publicdomain/zero/1.0/>

標高タイル、ベクトルタイル、また標高タイルを包含する三次元タイルについて、GitHub をツールとして用いたオープンソース実装による仕様の収斂が進んでいるように観測される。

標高タイル

概要

産総研がかねてより提唱していた「PNG標高タイル」と非常に類似性の高い標高タイルが、Mapzen 社により提唱されている。Mapzen 社は世界全体を覆う標高タイルサービスも提供している。

解説

地理院は、PNG標高タイルとまったく同じコンセプト(「画像タイルに対してピクセルパーフェクトな標高データ」)でエンコードのみ違う、CSV形式の標高タイルを従前からリリースしており、エンコード変更でいつでも合流可能な技術的状態になっている。

確認させていただきたいこと

  • 地理院/ 産総研とMapzenの仕様の違い

ベクトルタイル

概要

Mapbox 社が提唱している Mapbox Vector Tiles (.mvt) 方式が、フォーマット名称に会社名を含むことに対する抵抗感など伴いながらも普及している。esri 社がサポートに踏み切ったことが大きい。なお、ベクトルタイルの採用は、ブラウザにおけるジオデータのレンダ系が SVG から WebGL に変わっていくことと合わせて行われることが多く、その点も興味深い。

確認させていただきたいこと

  • mvtの競合仕様はどのようなものがありますか?
  • WebGLは3Dのための仕様だと認識していましたが、タイルは標高を含む3D表現がデフォルトになったということでよろしいのでしょうか?でも、ベクトルタイルと三次元タイルは別物なのですよね?
  • Mapbox社とesri社とを比較すると、比較的Mapbox社の方がオープン(OSMとの親和性などから)という評価をされていると_予測_するのですが、そうなのでしょうか。
  • Mapbox社の普及活動はどのようなものでしたか?
  • esri社がMapbox社仕様を受容した理由はどのように推測されますか?

三次元タイル

概要

Cesium を提供する AGI (Analytical Graphics, Inc.) 社から、三次元タイルが提唱されてきている。標高タイルも包含する仕様になる予定であるが、三次元タイルの主眼は三次元モデルのタイル化にある。

確認させていただきたいこと

  • issueを見ると、ユーザーからのフィードバックをそれなりに受けて改良している様子が見えますが、AGI社の改良方針はどのように分析できるでしょうか。
  • 他に競合仕様はありますか?
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment