Planet Georezo » April 10, 2011

Un Planet est un site Web dynamique qui agrège le plus souvent sur une seule page, le contenu de notes, d'articles ou de billets publiés sur des blogs ou sites Web afin d'accentuer leur visibilité et de faire ressortir des contenus pertinents aux multiples formats (texte, audio, vidéo, Podcast). C'est un agrégateur de flux RSS. Il s'apparente à un portail web.
Vous pouvez lire le billet sur le blog La Minute pour plus d'informations sur les RSS !

Feeds

61136 items (0 unread) in 112 feeds

Dans la presse

Du côté des éditeurs

Toile géomatique francophone

Géomatique anglophone

Blogs GeoRezo.net

Autres planets

Planet OSGeo

Abonnez vous à cette page (RSS) !

10 avril 2011
21:17
GIS-Lab: Raster Transparency для QGIS
sur Planet OSGeo

Новое расширение для QGIS и небольшая статья-описание. Расширение предназначено для интерактивного управления прозрачностью растровых слоёв и особенно полезно тем, кто работает с растрами, представляющими непрерывные результаты классификации выраженные например как проценты от 0 до 100. Расширение позволяет быстро интерактивно устанавливать прозрачность для диапазонов значений.

Ознакомиться с возможностями модуля, обсудить на форуме, посмотреть видеопример.

20:35
AnyGeo - GIS, Maps, LBS, Geo and Social Location Technology: Social-Loco 2011 Tackles Mobile, Social, Location Technology
sur Planet Geospatial - http://planetgs.com

Take note, an interesting mobile/social location tech event is taking place in San Fran early in May – Social-Loco 2011. This interesting event, now in its second year, features a terrific lineup of speakers and could turn out to be another “Must Hit” social/location event of the year. Running May 5th in San Fran at [...]

17:46
Les PLU bientôt à l’heure d’Inspire
sur Le blog SIG & URBA

La déclinaison d’INSPIRE est en marche. Le travail est engagé sur les annexes 2 et 3. L’annexe 2 touche à l’occupation du sol. Par un certain parallélisme des termes, l’annexe 3 porte sur l’usage des sols, ou « Land Use ». Ce thème de l’usage des sols va traiter principalement des documents de planifications tels qu’on les [...]

17:24
Between the Poles: Fukushima Daiichi: NISA requires two backup generators for each reactor at Japanese nuclear power plants
sur Planet Geospatial - http://planetgs.com

As a result of the Fukushima nuclear disaster, NISA is now requiring electric utility companies in Japan operating nuclear power plants to install two backup generators for each reactor instead of one as currently required.

Nuclear power plant operating companies have already moved to ensure backup in depth for power and cooling at Japanese nuclear power plants.
17:09
Between the Poles: Fukushima Daiichi: Video showing 15 m tsunami hitting the plant released by TEPCO
sur Planet Geospatial - http://planetgs.com

A short video taken about one km from the plant by a worker has been released by TEPCO. It shows what is now said to be at least 14 to 15 m high tsunami hitting the plant about an hour after the magnitude 9 earthquake March 11.

16:46
[Le blog SIG & URBA] Les PLU bientôt à l'heure d'Inspire
sur GeoRezo.net - Géoblogs
La déclinaison d'INSPIRE est en marche.

Le travail est engagé sur les annexes 2 et 3. L'annexe 2 touche à l'occupation du sol. Par un certain parallélisme des termes, l'annexe 3 porte sur l'usage des sols, ou "Land Use".
Ce thème de l'usage des sols va traiter principalement des documents de planifications tels qu'on les connait et à plusieurs échelles :
-schémas régionaux et SCOT
-documents d'urbanisme à l'échelle encore majoritairement communale
-et plans de secteur ou plans d'aménagement
Au delà des usages "planifiés", ce thème INSPIRE devrait également couvrir les usages existants, tout en distinguant bien usage et occupation, ce qui n'est pas toujours facile !

Les réflexions sont conduites au sein d'un groupe de travail européen composé de 12 membres de 8 nationalités différentes, et piloté par françois Salgé, chargé de mission auprès du Directeur général de l'aménagement, du logement, et de la nature au MEDDTL, qui joue ici le rôle de "facilitateur".

Les échanges au sein de ce "TWG", thématic working group, ont permis de constater une relative ressemblance entre les différents documents règlementaires : un zonage, un règlement, et différentes contraintes qui se superposent au zonage et qui apportent généralement des limitations à l'usage des sols

Le modéle et la nomenclature sont en cours de finalisation. Ces éléments devraient être mis à la consultation d'ici l'été avec des aller-retours jusqu'à début 2012. Cette consultation portera en même temps que les thèmes 2 et 3 occupation et usage des sols. Dans le document qui sera soumis pour avis, près de 80 pages, il est conseillé de regarder en particulier :
- 2.2. : "informal description" qui présente un tour d'horizon des éléments traités dans ces spécifications,
- 5.2. "application schema" et en particulier "narrative description" pour ceux que les schémas UML rebutent, et "feature catalogue" où l'on trouve les détails sur tous les sujets abordés.
Site inspire (toujours en anglais) : [inspire.jrc.ec.europa.eu]
La documentation est en anglais ce qui ne facilite pas la lecture !

A découvrir : en parallèle, l'initiative "plan4all" qui est une initiative de portail de l'urbanisme européen, ou plutôt de portail de la "planification spatiale" tel que décrit dans la documentation de présentation, cette fois accessible en français sur le site dédié : [www.plan4all.eu]

15:59
Sourcepole: Visually sorting images under Linux
sur Planet OSGeo

to visually sort images under Linux doesn’t seem to be a trivial task. I duckduckgo‘ed for a long time and had a look at various image and file managing applications before finding gthumb. And even there, you first need to create a “catalog” and within the catalog a “library” which will finally allow you to manually sort your images. All of which is not documented.

Once you’ve sorted your images, you’d possibly want to export the sorting? Again, no trace of any help or documentation: gthumb catalogs are saved under $HOME/.local/share/gthumb/catalogs/foobar.catalog.

Tomáš Pospíšek
15:59
Sourcepole: Visually sorting images under Linux
sur Planet OSGeo

to visually sort images under Linux doesn’t seem to be a trivial task. I duckduckgo‘ed for a long time and had a look at various image and file managing applications before finding gthumb. And even there, you first need to create a “catalog” and within the catalog a “library” which will finally allow you to manually sort your images. All of which is not documented.

Once you’ve sorted your images, you’d possibly want to export the sorting? Again, no trace of any help or documentation: gthumb catalogs are saved under $HOME/.local/share/gthumb/catalogs/foobar.catalog.

Tomáš Pospíšek

14:34
Kinect-supported Drone Builds 3D Maps
sur Planet Geospatial - http://planetgs.com

The brains at the Massachusetts Institute of Technology - MIT have really pushed the envelope with this impressive Kinect hack. Continue reading →

Click Title to Continue Reading...
14:23
Between the Poles: TEPCO moves to protect the world’s largest nuclear power plant from tsunamis
sur Planet Geospatial - http://planetgs.com

I blogged earlier about what Tohoku Electric and other utilities operating nuclear power plants are doing to prepare for earthquake and tsunami emergencies such as were experienced at Fukushima Daini and Daiichi.

TEPCO has released details of large tide walls that would protect the Kashiwazaki Kariwa Nuclear Power Station and its seven reactors from tsunamis. Kashiwazaki Kariwa is the largest nuclear power plant in the world. It was was off line for two to three years after the 2007 Niigata-Chuetsu earthquake caused damage to the plant, but not to the reactors.

Based on the experience at Fukushima, TEPCO says it has installed facilities on the upland part of the site to provide backup power and water injection to reactors and spent fuel pools to ensure cooling function in the event of a tsunami flooding the reactor buildings. TEPCO is also proposing to install tide barriers with watertight doors at Kashiwazaki Kariwa units 1 to 4. The intention is to prevent flood waters from entering the nuclear reactor buildings where power supply facilities and emergency diesel electric power generators are installed. Reportedly at Fukushima Daiichi backup generators were rendered inoperable by the 14 m tsunami and fuel tanks were washed away.
14:14
geographika: Accessing Cross Domain Data with YQL
sur Planet Geospatial - http://planetgs.com
The same origin policy prevents code from one domain accessing data from a different domain. For a mapping site requests for KML, GeoRSS, WFS services, and some WMS operations are all affected by this policy, and therefore require a range of workarounds, usually involving a proxy.

One solution is the ExtJS ScriptTagProxy that can be used to retrieve data from an external domain. However for this to work the server must return executable JavaScript code. For example to access an external WMS capabilities file you’d need to set up a special handler on your server to wrap the data in JavaScript before being added to your web page. This pattern is referred to as JSONP (JSON with padding).
YQL
Thanks to this Unwritten Guide to Yahoo Query Language it became apparent you can get Yahoo to automatically do this wrapping for you. Whilst using YQL is still technically a proxy, it’s a proxy you don’t have to worry about maintaining.

I’m not a huge fan of relying on commercial APIs and services, partly as if they are free then they can also change without warning or disappear, and partly as fully understanding the Terms of Service requires both a law and computer science degree.

However configuring your own proxy and wrapping is a large overhead if accessing data from another domain is the only reason you need server-side code.

YQL looks a lot like standard SQL, but can be used to query data from a URL. Go to the YQL Console and try out the following query:
```
select * from xml where url='http://api.geoext.org/1.0/examples/data/wmscap.xml'
```
An External WMS Capabilities Store
This method can be used to easily access a WMS Capabilities file on an external server. I’ve put a small demo online showing a working example. The source code can be found on BitBucket.

The example is based on GeoExt’s original WMS Capabilities demo. The code makes use of the ScriptTagProxy, and a slightly modified reader that takes the results part of the JSON (the XML) and passes it on to the standard WMSCapabilitiesReader:
```
GeoExt.data.YahooWMSCapabilitiesReader = Ext.extend(GeoExt.data.WMSCapabilitiesReader, {
    readRecords: function(data){
        data = data.results.toString();
        return Compass.Gis.WMSCapabilitiesReader.superclass.readRecords.call(this, data);
    }
});
```
Yahoo have many “clones” of services offered by the other web giants, which whilst well implemented don’t really interest me – when was the last time you looked at Yahoo Maps?. However along with YQL, Yahoo have a few interesting and unique developer tools such as Yahoo Pipes and YUI (in fact ExtJS branched out of YUI), so its worth keeping an eye on the often forgotten man of the Internet.

10:58
This Week's Best Google Maps
sur Google Maps Mania

rome2rio

Google Maps includes a number of little Easter Eggs with suggestions for your inter-continental travel. For example, if you ask Google Maps for driving directions from Japan to China Google Maps suggests, at step 42, that you 'Jet ski across the Pacific Ocean'.

If you don't fancy jet skiing then rome2rio could be the solution that you are looking for. This Google Maps based travel search engine can help you get to anywhere on Earth with flights, trains, ferry and driving directions.

GroupMe

GroupMe is a mobile app that lets you create your own social networks to share group messages, conference calls, photos or Google Maps.

Using GroupMe you can create a group with people who are already in your contacts. Once you have created a group you can then text message the group, start an instant conference call, share photographs or share a Google Map showing the location of everyone in the group.

As soon as you create a group you instantly have access to a shared Google Map. The map lets you share your location with the people in your group, find out where your friends are and see them all on a map.

The GroupMe app is available for iPhone, Android and Blackberry.

CultureNow

This Google Map is mapping the locations of history, art and architecture in the public realm. The project was started in New York, and has mapped a huge number of cultural locations in the city, but now also shows cultural landmarks across the USA.

It is possible to search the map by category (and there are a lot of them). So, for example, it is possible to refine a search for art galleries, museums or historic buildings etc. If you click on a map marker you can get more information about the listing.

Each listing also includes a list of other nearby cultural locations.

________________

10:01
Between the Poles: Fukushima Daiichi and Daini: Casualties among TEPCO workers and health impacts on general public
sur Planet Geospatial - http://planetgs.com

WNN has reported the casualties at the Fukushima nuclear plants or that can be ascribed to the events at Fukushima Daiichi and Daini.

Three TEPCO workers have died at the plants, one at Daini and two at Daiichi. Two workers who were missing since the earthquake and tsunami March 11 were found dead in the -1 level (basement) of the turbine building of Unit 4 at Daiichi. According to TEPCO they had been "working to protect the safety of the Fukushima power station after the earthquake and tsunami." One worker died at Daini after being trapped with serious injuries in the crane operating console of one of the units during the earthquake. According to WNN these are the only deaths at Japanese nuclear power plants resulting from the earthquake, tsunami and nuclear emergency.

Since the earthquake 370 workers have been working at Daiichi to stabilize the damaged reactor units. Of these 21 have experienced radiation doses of over 100 millisieverts (mSv). According to WNN nuclear workers are permitted to receive a maximum aggregate dose of 20 mSv per year. If that limit is exceeded in any year, the worker is relieved of nuclear duties for the remainder of the year. In an emergency safety regulators may raise the aggregate maximum exposure to 100 mSv. Above 100 mSv it is possible to begin to relate radiation exposure statistically to health effects, specifically cancer. March 16 Japanese authorities authorized exposures of up to 250 millisieverts because of the seriousness of the situation at Daiichi. WNN says that at this point no one has been exposed to an aggregate annual dosage of 250 mSv.

General public

To date "no effects on health or significant contamination cases" have been identified among the general public. The effects of prolonged exposure to elevated low level radiation on health is a controversial topic, but symptoms are not apparent immediately. We all experence exposure to background radiation which according to the US Center for Disease Control is typically about 3 mSv per year.
9:55
RexHansen.com: Get current user info within a Server Object Extension
sur Planet Geospatial - http://planetgs.com

Server Object Extensions (SOEs) give developers the ability to utilize the extensive geoanalytical capabilities of ArcObjects within an ArcGIS Server service. They also provide a framework that enables access to custom functionality in a service through the standard Web service protocols SOAP and REST. Enabling Web access to an SOE is well documented in the ArcObjects SDK.

ArcGIS Server Web services can also be secured using token or Web server authentication methods. This poses the question: if an SOE is enabled on a secured Web service, can the authenticated user be retrieved within the SOE? Yes, in ArcGIS Server 10 this is possible.

Use the C# code provided below as an example. Basically, within your SOE code get the current server environment and cast to IServerEnvironment2 to gain access to UserInfo. If authentication is enabled for ArcGIS Server Web services, each request to a service will be associated with an authenticated user. UserInfo will contain the user name and roles within which that user is present for the current request. Note, when Web server authentication is based on Windows users and groups, the user name is in the format domain\user.

Unfortunately, REST SOE's hosted on ArcGIS Server for .NET require ArcGIS Server 10 service pack 2 for this to function. ArcGIS Server 10 service pack 2 will be available for download on the ArcGIS Resource Center soon.
9:55
RexHansen.com: Get current user info in a Server Object Extension
sur Planet Geospatial - http://planetgs.com

Server Object Extensions (SOEs) give developers the ability to utilize the extensive geoanalytical capabilities of ArcObjects within an ArcGIS Server service. They also provide a framework that enables access to custom functionality in a service through the standard Web service protocols SOAP and REST. Enabling Web access to an SOE is well documented in the ArcObjects SDK.

ArcGIS Server Web services can also be secured using token or Web server authentication methods. Since SOEs are can be enabled on a specific service, authentication rules configured on a service apply to all of its extensions, including custom SOEs. This poses the question: if an SOE is enabled on a secured Web service, can the authenticated user be retrieved within the SOE? Yes, in ArcGIS Server 10 this is possible.

Use the C# code provided below as an example. Basically, within your SOE code get the current server environment and cast to IServerEnvironment2 to gain access to UserInfo. If authentication is enabled for ArcGIS Server Web services, each request to a service will be associated with an authenticated user. UserInfo will contain the user name and roles within which that user is present for the current request. Note, when Web server authentication is based on Windows users and groups, the user name is in the format domain\user.

Unfortunately, REST SOE's hosted on ArcGIS Server for .NET require ArcGIS Server 10 service pack 2 for this to function. ArcGIS Server 10 service pack 2 will be available for download on the ArcGIS Resource Center soon.
6:16
GIS Lounge: Of Interest: Future of Navigation, Beauty of Maps on YouTube, Time Zones, Geographers in Demand
sur Planet Geospatial - http://planetgs.com

Di-Ann Eisnor of Waze and Craig Chapman of Inrix are part of a roundtable podcast entitled “Where is navigation going?” over on Cnet. The podcast discusses how traffic data is collected, comparison of the benefits of car navigation devices and inter-vehicle and vehicle-to-infrastructure communication. (via @DiAnnEisnor) BBC has posted the entire twelve episodes of the Beauty [...]
6:00
OpenGeoData: More cool tricks by the MapQuest Open team
sur Planet Geospatial - http://planetgs.com

The MapQuest Open team have done it again! Check out these cool tricks they've created for OSM fun:

API allows searching the OpenStreetMap (OSM) data by name=value pairs or bounding box! Very cool stuff if you're trying to find all the golf courses in OSM data in the greater Denver area:http://open.mapquestapi.com/xapi/api/0.6/node%5Bamenity|leisure=golf_course%5D%5Bbbox=-105.20983780356221,39.59556488319815,-104.66052139733415,39.83325197240866%5D
Here's the link to the actual tool:   [open.mapquestapi.com] all GUI and pretty with an XML response.
The Nominatim Pre-Indexed Data Service gives OSM developers another database location (hosted on the MapQuest servers) from which to download the large Planet OSM data file from - the beauty is that this data file is already indexed so you don't have to waste any time indexing a 15GB+ file! Once a developer has Nominatim running on their local server, they can download, via the NPI Data Service, updates approximately every 5 minutes.

A recent quote from the Open team:"you can set Nominatim up on a fairly crappy machine as long as it has reasonable disks, because a single processor home computer can load it from NPI." They're all about keeping things easy for anyone wanting the latest and greatest geocode data from OSM!
Lastly, they've created a Broken Polygon Report that anyone can use to help make OSM data better and more accurate via JOSM or Potlatch 2. Think of how you've been editing an area only to find a sizable chunk of map data that is just messed up and you have to correct that first, before finishing up your edit...arugh! Another example is when OSM had an issue last December where a broken polygon ended up having all of Virginia being shown in Maryland. A broken polygon can mean that any map area can get "flooded" by another, as one polygon's fill bleeds into the other via that broken gap. This report allows folks to easily find these little (or big) errors and fix them!
You can read more about XAPI, NPI and the Broken Polygon tool on the DevBlog and click on the pretty hyperlinks here: [devblog.mapquest.com]
Big, huge, massive thanks go out to Matt Amos, Brian Quinion, Kumiko Yamazaki and Cameron Thomas for making this happen!

Permalink | Leave a comment  »

← April 9 (10 items) April 11 (59 items) →

Communauté	Ressources	L'emploi	Le marché	L'association	Fils RSS
Forum Blogs Wiki Planet Carte des membres Sites amis	Annuaire Agenda Biblio Netvibes Fiches AMO-CNIG Paris PCGIS Téléchargements	Offres d'emploi Banque de CV Carte des CV Formations Démarche Métiers	Geo-Entreprises Geo-Communiqué Appels d'offres	L'association Qui sommes-nous ? Nous aider Bienfaiteurs Partenaires Historique Statuts	Tout le site Job Géomatique Services GeoBlogs ...	Faire un don Mentions légales

Le portail francophone de la géomatique

Feeds