Tag Info

Hot answers tagged

18

You can save a layer in the KML format directly from QGIS, just right-click the layer name in the Layers window, click Save As.., and choose KML from the list of file formats:


15

ESRI Personally, I would steer clear of the ESRI stuff. I'm working with ESRI Geodatabases and find the restrictions perplexing and restrictive. The Enterprise offering may be different, but I choose not to hold my breath. (This is a biased opinion, and I'm suggesting you do some research and make your own decision here. I have little experience with ...


14

GEE really is a visualization platform, not a enterprise GIS. With a true GIS you also have the need/ability to create data and do more complex analysis with it aside from draping it over a globe. I have worked with systems where GEE was a compliment to our ESRI systems; so we didn't use ArcGIS Explorer to view the data, the users used Google Earth. You can ...


10

WGS84, according to: http://support.google.com/earth/bin/answer.py?hl=en&answer=148110 Cheers, Ryan


10

There are 2 immediate options that would best get you where you are trying to go. Your first, and probably easiest option, would be to download Quantum GIS, using the OSGeo4W Installer. Once you have installed that program, follow this tutorial, which covers Importing a .csv file to QGIS. Once you have imported the file, simply right click on the layer ...


9

There are 3 possible reasons what could have happened: There was actually an island at that location, and is not longer present. The possibility of this is remote. This could have been a Copyright Easter egg. This is mis-information that is put in a map, so that when someone copies it, you can use it as a red flag to indicate that copying took place. See ...


8

You can do it with GeoServer. Installing and "linking" Geoserver to Postgres/PostGIS database is quite easy. KML KMZ Output


8

Apart from, as @underdark says ST_Length() returns a cartesian distance between the two points which in an unprojected CS is meaningless in this case, I would go with the answer you get from PostGIS. Google Earth uses a spherical globe, whereas the WGS84 globe is a spheroid - it is slightly squashed at the poles. Over short distances, there won't be much ...


8

Apparently, the measurment ruler is not accurate over long distances > 5,000 km. Google's offical stance says, "makes no claims as to the accuracy of the coordinates in Google Earth. These are provided for entertainment only and should not be used for any navigational or other purpose requiring any accuracy whatsoever".


7

I think the problem is your time span. Its supposed to be in the format YYYY-MM-DDThh:mm:sszzzzzz (see KML Ref) "1944-06-06T06:2010-10-26T06:30:08 " is wrong in the "mm" part. Also, if you're trying to animate a set of time periods rather than points, you need timestamp rather than span. Time should be before and after according to the documentation ...


7

One of the most spectacular animated maps I've seen is Google's Wind Map.


6

Kannel is the most known sms gateway (Free and Open Source), it runs both in Linux and Windows. You can connect it with a GSM modem or a mobile phone to send or receive sms (or MMS). If you have a GPS who can connect to GSM you have the solution. AND of course it connected with Mysql or Postgresql and more DB. From a database you can send the data to a web ...


6

There is a Google AppSpot website that will let you overlay Google Maps (and many others) in Google Earth for Free (You do need have a gmail account and allow the site monitor your usage) http://ge-map-overlays.appspot.com/


6

Generally speaking, to convert a vector in QGIS you just need to right click on the layer in the TOC and select "save as...". In the dialog that will pop up you need to choose the CRS you need. Be sure that when loading the original vector this has (just check in the vector properties) the right CRS, it is not unusual to have vectors with non explicit CRS, ...


6

There is a little bit of information which might help you in your task. First you may need to download FWTools inorder to use geotifcp and listgeo. Create a TIFF File(You already did it..) Let us call it initialtif.tif find the image width and height(from where you saved it). imageWidth = 1016 imageHeight = 551 Create a World File for our ...


5

You can enable the KML/KMZ capability of an ArcGIS Server map service for rendering in Google Earth.


5

Arc2Earth Desktop is the only tool I know of that provides a way to do this.


5

Google Earth can display a number of file formats, which may be generated programmatically, but in general the user controls the interaction. The Google Earth Plugin can use the rich set of tools available for web development, and allows DOM manipulation of the data used within the earth environment. You can interact with the user environment, modifying the ...


5

Bill Huber gave the right answer in the comments. I delayed the answer by running the NGS inverse tool incorrectly. It looks like confusion between latitude and longitude order. I did put the coordinates in the wrong order when I used the NGS inverse tool. Stupid of me! If I enter values correctly, the geodesic distance is 256414.3059 m. If I enter the ...


5

You will need a KML file of the world borders as polygons. A quick Google turned up this Which seems to be pretty much what you want. I'm not sure if there is a water polygon in that dataset, so you may still have the sea floor. If that's the case, you'll need to import the KML file into something like Quantum GIS, create a rectangular polygon covering the ...


5

One of the fastest and easiest possible solutions uses a short program written with the free open source program R (the R project for statistical computing). The following code computes the distance matrix (using spherical distances) between two arrays of (lon, lat) coordinates named customers and facilities and stores it in an array distances (with rows ...


4

Would Gammu SMS Daemon http://wammu.eu/smsd/ be a start? Gammu SMS Daemon is a program that periodically scans GSM modem for received messages, stores them in defined storage and also sends messages enqueued in this storage. It is perfect tool for managing big amounts of received or sent messages and automatically process them. You can currently ...


4

Google Earth is mostly nice visualization, not serious GIS. And may be that's a reason why you dont see much of it being discussed here :) ESRI AGS on the other hand is a Industry Standard GIS...super serious stuff, tons of features out of the box, plus plethora of customization options make it the numero uno choice for most of the enterprise GIS ...


4

For me, it is down to requirements. If the users just need to visualise basic data, then Google may be the way to go, but, and a big BUT, if you ned to capture, create, edit, analyse, crunch data, geo-processing, bespoke interfaces, web-publishing, web services etc etc, then ESRI products are the way to go. ESRI also ensure their products interface with ...


4

The highest-resolution, seamless and cloudless imagery you're going to find is from NASA's Visible Earth.


4

Render your own using POV-Ray, a ray casting engine that can make images of any arbitrary size. Here's an example earth centered on Southern California: http://geohack.net/earth/sb-2048.png See this excellent guide for details on the approach.


4

You can find basics information regarding resolution and accuracy on Google Earth wikipedia page. Most land areas are covered in satellite imagery with a resolution of about 15 m per pixel. This base imagery is 30m multispectral Landsat which is pansharpened with the 15m [panchromatic] Landsat imagery. However, Google is actively replacing this base ...


4

If you don't need satellite imagery or 3D stuff it's possible with a combination of: OSM data imported in Postgresql/Postgis (via osm2pgsql) Mapnik used to render map tiles OpenLayers used to display the web map (serving tiles rendered by Mapnik) some Javascript middleware (ExtJS) to facilitate retrieving data as required by vector layers and build UI ...


4

Google doesn't allow it. There are some folks in the Google Earth Forums that have found some "unofficial" workarounds: http://www.google.com/support/forum/p/earth/thread?tid=4a722cff2ea80a5c&hl=en. Complied from a few posts on those forums: http://www.gelib.com/google-maps.htm http://www.mgmaps.com/kml/ ...


4

If you want to serve the data as static KML, the easiest option is to use ST_AsKML function in PostGIS. However if you want to use live KML data, one option could be using GeoServer and get the output in KML format.



Only top voted, non community-wiki answers of a minimum length are eligible