[Talk-br] Digest Talk-br, volume 102, assunto 24

Helio Cesar Tomio hctomio em gmail.com
Sexta Março 17 20:30:36 UTC 2017


Texto muito bom Sérgio.
Toda a história a limpo, desmentindo aquela alegação que não houve
discussão anteriormente.

Em 17/03/2017 13:50, "Luis Bahiana" <luis.bahiana em gmail.com> escreveu:

> Se precisarem de ajuda para tradução ou versão coloco-me a disposição
>
> 2017-03-14 13:23 GMT-03:00 <talk-br-request em openstreetmap.org>:
>
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>> Tópicos de Hoje:
>>
>>    1. Proposal of import: Brazilian Geodetic Network
>>       (man_made=survey_points) (Sérgio V.)
>>
>>
>> ----------------------------------------------------------------------
>>
>> Message: 1
>> Date: Tue, 14 Mar 2017 16:22:41 +0000
>> From: Sérgio V. <svolk2 em hotmail.com>
>> To: "talk-br em openstreetmap.org" <talk-br em openstreetmap.org>
>> Subject: [Talk-br] Proposal of import: Brazilian Geodetic Network
>>         (man_made=survey_points)
>> Message-ID:
>>         <RO1P152MB0810A9F1942BD6C60818E9FD90240 em RO1P152MB0810.LAMP15
>> 2.PROD.OUTLOOK.COM>
>>
>> Content-Type: text/plain; charset="utf-8"
>>
>> Bom dia pessoal, estou preparando a proposta abaixo para o
>> https://lists.openstreetmap.org/pipermail/imports/.
>>
>> Por favor sintam-se livres para examinar.
>>
>> Antecipadamente obrigado.
>>
>> - - - - - - - - - - - - - - - -
>>
>> Hello.
>> I'm member of brazilian OSM users community.
>> I present here for discussion, and asking approval for, the proposal for
>> the import of brazilian geodetic network of survey points (SGB - Sistema
>> Geodésico Brasileiro).
>> Firstly, sorry if not good english. Also sorry for the technical problems
>> that arose due to the size of elements in previously ill imported relation.
>>
>> This proposal was previously formally informed in brazilian talk list in
>> https://lists.openstreetmap.org/pipermail/talk-br/2017-March/012063.html
>> .
>> (Also this post here will be copied to brazilian talk list.)
>>
>> The discussions in Brazilian community: actually started in 6th march in
>> Telegram channel of the brazilian community, where it has been carried on,
>> and where we generally use to talk most (159 members, around some 80 users
>> connecting daily and some 20 activelly communicating). Many members made
>> remarks and suggestions about it and, after all arrangements, general
>> aprovals for procedures and utility purpose.
>>
>> The purpose of this proposal: is to import the survey points published by
>> the brazilian government agency for geographical data (called IBGE - (
>> http://www.ibge.gov.br/home/geociencias/geodesia/default_sgb_int.shtm).
>>
>> The source data: is all produced and published by IBGE.
>> The government also publishes these data through the more general portal
>> for brazilian spatial data (INDE: http://www.visualizador.inde.gov.br<
>> http://www.visualizador.inde.gov.br/> - Menu: Redes Geodesicas), from
>> where it was dowloaded.
>>
>> About the licenses for the data: as said in previous exchange of messages
>> of other brazilian OSM member with IBGE officials [1], and as stated by the
>> brazilian national law for access to information (known as "LAI"), all the
>> government data, including IBGE, is free for access, not even requiring to
>> say what for it is intended [2] (the exceptions quoted in the law must not
>> even be published by the government). IBGE officials explicitly stated, as
>> in previous quoted messages, it's free for OSM purposes, for copy, sharing
>> and changes, since quoting the source, and not requiring further back
>> communication.
>>
>> The aim of the import: is to have all these points with their precise
>> coordinates provided by the government, placed in OSM brazilian map to help
>> on aligning imagery, fixing borders, found places in remote regions, etc.
>>
>> It can be objected: found no survey point in imagery on the ground.
>> That's true. Many things pedestrians have mapped can't be seen on
>> sattelite imagery now, like door numbers, shop names, highway signals, and
>> many other small things, perhaps also fire_hidrants, etc. It usually
>> resides all on local mapper's word.
>> Also imagery resolution is improving constantly, so perhaps not too later
>> we all can see many more things on sattelite imagery.
>> Anyway, the government, through its data itself and its official reports
>> of survey points, states they are there on the ground.
>>
>> As a single example: there's a survey point (a small plate) over a
>> boundary_stone in the Brazil-Venezuela-Guyana triple border, reported in
>> [3]. It seems not visible in imagery, nor the boundary_stone. At least I
>> still haven't found it (but I'm looking for). But just seeing this
>> officialy reported point in JOSM (5.2018977222<tel:(201)%20897-7222>,
>> -60.7375541111)[4] indicates this triple border in OSM is currently more
>> than 1km far from that official measurement, thus deserving some revision.
>>
>> Other general informations:
>> -All the objects proposed to import came previously converted by IBGE in
>> WGS84 format in the original downloaded shape file.
>> -There will be no relation (in OSM peculiar concept for relation) to be
>> stablished between these individual points.
>> -Only are meant to be imported the portion of the stations classified as
>> in good conditions, leaving aside the ones destructed or not found as
>> quoted in the official reports. So the final total number of points to be
>> imported is smaller than in the original shp.
>>
>> The proposed tags are these (english translation or meaning below in
>> parenthesis):
>>
>> description=Rede Geodésica do IBGE - Estação SAT DOPPLER
>>     (=IBGE Geodetic Network - <6 types of station, for: SAT DOPPLER; SAT
>> GPS; Polygonal; Triangulation; Elevation Reference; Permanent GNSS>); by
>> these 6 types of description= station...*... the data is aimed to be also
>> accessible for recalling and maintence.
>> ele=* (when geometric height available)
>> man_made=survey_point
>> note:en=Please: do not displace the point (official coordinates)
>> note=Não deslocar o ponto (coordenadas originais do IBGE)
>>     (almost the same as note:en, with local exortation tone)
>> ref:loc=São Félix do Xingu
>>     (the locality where the point is, perhaps even not mapped itself)
>> ref=90970
>>     (the particular and unique name or number of the station)
>> source=IBGE/INDE/BDG_DOPPoint.SHP
>>     (the original shape file)
>> sourceːele = IBGE/MAPGEO2015
>>     (for Elevation Reference: MAPGEO2015 is the geoid model in Brazil)
>> url=*
>>     (to access the complete official report, sometimes it has photos and
>> other info that help a bit more to identify)
>>
>> The proposal is documented at:
>> https://wiki.openstreetmap.org/wiki/Importa%C3%A7%C3%A3o_das
>> _Redes_Geod%C3%A9sicas_do_IBGE
>>
>> Thank you in advance for your evaluation.
>> - - - - - - - -
>> [1] https://lists.openstreetmap.org/pipermail/imports/2013-July/
>> 001981.html
>> https://lists.openstreetmap.org/pipermail/imports/2013-July/002031.html
>> https://lists.openstreetmap.org/pipermail/imports/2013-July/002032.html
>> [2] http://www.acessoainformacao.gov.br/assuntos/conheca-seu-direito
>> [3] "Localização: Na parte mais alta do Monte Roraima, em território
>> brasileiro...", says, "Location: In the upper part of Mount Roraima, in
>> brazilian territory..." (http://www.bdg.ibge.gov.br/bd
>> g/pdf/relatorio.asp?L1=90128)
>> [4] 05 ° 12 ' 06,8318 " N 60 ° 44 ' 15,1948 "W
>> - - - - - - - -
>>
>>
>> - - - - - - - - - - - - - - - -
>>
>> Sérgio - http://www.openstreetmap.org/user/smaprs
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>> ------------------------------
>>
>> Subject: Legenda do Digest
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>> ------------------------------
>>
>> Fim da Digest Talk-br, volume 102, assunto 24
>> *********************************************
>>
>
>
>
> --
>
> Luis Cavalcanti da Cunha Bahiana
>
> Geógrafo : Coordenação de Geografia - IBGE
>
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