[Gvsig_english] gvSIG Mobile workspace - GPS arrow does not work with gvsig mobile log

Thu Oct 14 18:28:13 CEST 2010

Hello, Marcel:

> Any idea, why that bug exists, that the GPS arrow
> won't be displayed while I am not moving?? perhaps
> I could change it in my version, then.

It's a bad implementation rather than a bug. In a certain place, some method says: 'Oh, I'm getting the same coordinate again so I'm not going to report it', which I think is not a good idea in a rather event-driven context.

In the libLocation project there is a class called:

org.gvsig.mobile.location.gpsinput.nmea.GPSNmeaDataProcessor

which extends:

org.dinopolis.gpstool.gpsinput.nmea.GPSNmeaDataProcessor (the source code is not in the workspace)

whic extends this class:

http://bit.ly/dC9Osz (the source code is not in the workspace)

In that class (GPSGeneralDataProcessor) there is a variable:

protected PropertyChangeSupport property_change_support_;

The PropertyChangeSupport class only reports "changes", which means that if the new value is the same as the old value, no notification is sent. The code for that class is actually in the workspace ('boot' project), but if you change the code of that class to always report values, the resulting application will work in the PDA but I don't think it will work in Eclipse because Eclipse is not using that source code, so maybe the best option is to rewrite in:

org.gvsig.mobile.location.gpsinput.nmea.GPSNmeaDataProcessor

the methods that use property_change_support_ in GPSGeneralDataProcessor, to make sure that PropertyChangeSupport  is never used, and we would use instead a new class (for example, MyPropertyChangeSupport) with the same code, but reporting always the new value even if it's the same as the old value.

As for the simulation period, I don't think I understood what you said. Each line is a NMEA message. If a GPS device generates 8 NMEA messages per second and you want a realistic simulation, you have to set period = 125 ms. I don't know what you mean (?)

Regards,

Juan Lucas Domínguez Rubio
---
Prodevelop SL, Valencia (España)
Tlf.: 96.351.06.12 -- Fax: 96.351.09.68
http://www.prodevelop.es <http://www.prodevelop.es/> 
---

________________________________

De: gvsig_internacional-bounces at listserv.gva.es en nombre de Schoolmeesters
Enviado el: mié 13/10/2010 12:54
Para: Users and Developers mailing list
Asunto: Re: [Gvsig_english] gvSIG Mobile workspace - GPS arrow does not work with gvsig mobile log

Hello again...

just one more thing: I have installed JRE 1.5_22, but the GPS connect button seems not to work?! Afterwards, using 1.6 again, the button works again. So I have tested those nmea files again:

1.) Using the "working.nmea" (logged with a septentrio receiver) -> GPS Arrow is displayed and map is recentered...

2.) Using the gvsig-logged NMEA (same data) -> everything is the same (working)

3.) Using  the "ublox.nmea" (logged with a ublox receiver, reedited for NMEA DATA ONLY) -> it does not seem to work at the beginning, as you mentioned the bug of the "not moving antenna", but works after a few seconds, as soon as the antenna is moving,...

4.) Using directly the ublox receiver via COM Port -> GPS arrow is not displayed first, but as soon as I have changed the ublox specific settings (EKF enabled -> now disabled), the arrow is displayed. Any idea, why that bug exists, that the GPS arrow won't be displayed while I am not moving?? perhaps I could change it in my version, then.

Well, in this context, I want to ask another little question about the period, I am setting for simulating GPS: Thats the time between 2 lines, right?

But NMEA code consists of more than ONE LINE per tick (e.g. 1Hz) - so better it should be the time for one whole nmea message, shouldn't it? perhaps the console could display one package at once instead of line by line? (e.g. ublox consists of 8 lines by default) - just as a suggestion :)

Regards,

Marcel S.

Am 13.10.2010 11:13, schrieb Schoolmeesters: 

	Hello,

	I have solved the problem with your zipped source code. The project files have been extracted to "src" (=a subfolder of my workspace) instead of directly to the workspace! I've been surprised that each package does not have any marker that it was missing or something. That's why I thought, it can be ok to save it elsewhere...and did not change it earlier...but I remembered that I've got similar problems before.

	The run config is about the same as mine.

	Well, I'll try to test the GPS arrow then,...and, of course, other functions, too :)

	...it is the real last version of gvsig mobile, isn't it? 

	Regards,

	Marcel S.

	Am 13.10.2010 09:17, schrieb Juan Lucas Dominguez Rubio: 

		Hello.
		Sorry I forgot to attach the screenshot with the 'run configuration' (gvsigmobile_run.png).
		I am using JDK 1.5.0_15 in my Eclipse settings, with the compiler level compliance set to 1.4

		Which output do you get in the Eclipse console and in the log files?

		Regards,

		Juan Lucas Domínguez Rubio
		---
		Prodevelop SL, Valencia (España)
		Tlf.: 96.351.06.12 -- Fax: 96.351.09.68
		http://www.prodevelop.es <http://www.prodevelop.es/> 
		---

________________________________

		De: gvsig_internacional-bounces at listserv.gva.es en nombre de Schoolmeesters
		Enviado el: lun 11/10/2010 11:46
		Para: Users and Developers mailing list
		Asunto: Re: [Gvsig_english] gvSIG Mobile workspace - GPS arrow does not work with gvsig mobile log

		Hello Juan,

		thank you for testing.

		I already thought, that it might be a problem of the SVN code. I've already tried your ZIP, but I didn't get it run correctly. So I need the parameters (the mentioned screenshot is missing, I think?) and perhaps the correct compiler settings (where I've got problems sometimes - whih JDK/JRE should be set actually). What about the missing projects, which are listed in the install.txt, but not inside the ZIP? (e.g. libInternationalization)

		I am using the OSM WMS, which you have mentioned in a message before, so the SRS should be the right one. Even if I don't use any map, the SRS is set to EPSG:4326, I think. And, of course, I always click that button :) but I'll try it again as soon as I can work with the zipped code.

		Regards,

		Marcel S.

		Am 11.10.2010 10:06, schrieb Juan Lucas Dominguez Rubio: 

			Hello, Marcel.

			I don't know why you are having issues with the source code from the SVN, but I recommend to use the ZIP file I pointed out in a previous message if you can't solve them. I have attached a screenshot with the parameters I am using.

			Regarding the NMEA files, I have tested the three files you have sent and all seem to work, but remember this:

			- If the current SRS of the view is not EPSG:4326, gvSIG Mobile will reproject the GPS coordinates to that SRS, so if you add a layer in a SRS which is not known by gvSIG Mobile, the GPS arrow will be painted in an absurd place or not painted at all. Which SRS are you using? If you are using maps of Germany, you'll have to use layers in EPSG:4326, EPSG:32632 or EPSG:32633. Besides, you have to click on the "show GPS arrow" which is not active  by default.

			- I think you have sent three NMEA files (gvsig_log.nmea, other_log.nmea, COM17.ubx). The first one has a long period at the start without new coordinates, so this can cause that the arrow does not show for some time. The file COM17.ubx has some ublox-specific messages. Those messages are ignored by the application and other messages are processed correctly. The problem with this file is that it has a new coordinate at the very beginning, and then the same coordinate is repeated, so there is not a new coordinate and the application will not show the GPS arrow (this is a little bug actually). In this case, you should use a long period in the simulation (for example 1000 miliseconds) and when you start the simulation, quickly click on the "view GPS arrow" button, so the arrow is displayed before the first coordinates are processed. Or, you can use a simulation file where the coordinate actually changes from time to time.

			Regards,
			Juan Lucas Domínguez Rubio
			---
			Prodevelop SL, Valencia (España)
			Tlf.: 96.351.06.12 -- Fax: 96.351.09.68
			http://www.prodevelop.es <http://www.prodevelop.es/> 
			---

________________________________

			De: gvsig_internacional-bounces at listserv.gva.es en nombre de Schoolmeesters
			Enviado el: vie 08/10/2010 23:51
			Para: Users and Developers mailing list
			Asunto: Re: [Gvsig_english] gvSIG Mobile workspace - GPS arrow does not work with gvsig mobile log

			Hello again,

			here I've got an original nmea log file of ublox (whole data ublox is sending).

			It is noised by lines of not readable code. Perhaps thats a little problem for gvsig mobile?

			However, as said before, when gps activity is displayed correctly, the gps arrow should be displayed, too.

			Regards

			Am 08.10.2010 21:58, schrieb Schoolmeesters: 

				Hello again,

				here I have added 2 different nmea files, one is logged with gvsig mobile (run on Eclipse workspace), the other has been logged with a ublox program. 

				Gvsig mobile does not seem to log constantly the same lines or that can be a problem in combination with the uBlox receiver. 

				When I am simulating GPS (using other_log.nmea) and create a log file and use this log file, the created log file looks exactly the same as "other_log". 

				But as I said, the arrow is not displayed even if I connect directly to the GPS receiver @ COM Port...but viewing the gps activity, everything is displayed correctly, I think. That's strange, as I thought, that the arrow would get the same information as the gps activity.

				I should test other receivers, I think. But perhaps you have another idea, it should be possible to get the same information or gps arrow as for gps activity.

				Regards,

				Marcel S.

				Am 07.10.2010 09:58, schrieb Juan Lucas Dominguez Rubio: 

					Hello, I have downloaded the source code from here:

					http://forge.osor.eu/frs/download.php/1041/gvSIG_Mobile_Pilot-0.3-src.zip

					and recorded this video:

					http://www.youtube.com/watch?v=WPHpByPnqzU

					That does not work for you?

					That WMS server is not always available, though:

					http://www.prodevelop.es/files/fm/public/screenshots/gvsig_mobile/server_error.jpg

					Can you send any sample NMEA file to the list so we can check it ourselves?

					Regards,

					Juan Lucas Domínguez Rubio
					---
					Prodevelop SL, Valencia (España)
					Tlf.: 96.351.06.12 -- Fax: 96.351.09.68
					http://www.prodevelop.es <http://www.prodevelop.es/> 
					---

________________________________

					De: gvsig_internacional-bounces at listserv.gva.es en nombre de Schoolmeesters
					Enviado el: jue 07/10/2010 2:18
					Para: Users and Developers mailing list
					Asunto: Re: [Gvsig_english] gvSIG Mobile workspace - getting "WMS image error" after trying to load files from WMS

					Hello again,

					thank you for testing the WMS. I've tested it again (the NRW one) and did not get any picture loaded (no matter which EPSG I choose). On the other hand, the OSM one works fine. So I just have to find an adequate wms, I think. That is ok.

					But concerning the gps arrow I've tested again (no map background)

					1.) connecting to a GPS device at COM port, showing position @ 8.42171° / 49.00797° ------> arrow is not displayed

					2.) connecting to a logged nmea file (logged by gvsig mobile, same position) -----> arrow is not displayed, either

					3.) connecting to an old nmea file (logged by another application, approx. same position)  ----> arrow is displayed and even centered to correct position (checked with map data)

					I'll check whether it will work with another GPS receiver. I don't understand, what should be different. It is always nmea code! 

					However, the position is always displayed correctly. Shouldn't the arrow get the position from the same source as the displayed position (button: display coordinates)

					Regards,

					Marcel Schoolmeesters

					Am 04.10.2010 12:45, schrieb Juan Lucas Dominguez Rubio: 

					Hello, Marcel.

					All the URLs in this message can be tested directly in a web browser. In one of my tests using a web browser, this URL returned a very ugly Java stack trace:

					http://www.gis.nrw.de/wms/DGM50?REQUEST=GetCapabilities&SERVICE=WMS&EXCEPTIONS=XML

					But in other attempts, the response was OK (a XML file with the server capabilities)

					This request works too (using the German EPSG;31429):

					http://www.gis.nrw.de/wms/DGM50?REQUEST=GetMap&SERVICE=WMS&VERSION=1.1.0&LAYERS=DGM50&SRS=EPSG:31492&BBOX=2495820.074603175,5597231.470778579,2715995.7222222225,5803033.633983327&WIDTH=338&HEIGHT=317&FORMAT=image/jpeg&STYLES=&TRANSPARENT=TRUE

					This request returns a blank image, which I think is caused by a bug in the WMS server:

					http://www.gis.nrw.de/wms/DGM50?REQUEST=GetMap&SERVICE=WMS&VERSION=1.1.0&LAYERS=DGM50&SRS=EPSG:4326&BBOX=6,50.5,8.5,53&WIDTH=300&HEIGHT=300&FORMAT=image/png&STYLES=&TRANSPARENT=TRUE

					The coordinates of the requested box are BBOX=6,50.5,8.5,53 which I think are correct and that should return an overview of that German state. Here is an example using the same coordinates with a different WMS server:

					http://osmwms.itc-halle.de/maps/osmfree?SERVICE=WMS&&REQUEST=GetMap&SERVICE=WMS&VERSION=1.1.1&LAYERS=grenzen&SRS=EPSG:4326&BBOX=6,50.5,8.5,53&WIDTH=752&HEIGHT=499&FORMAT=image/jpeg&STYLES=default&TRANSPARENT=TRUE

					So I think that WMS server says that it can provide maps in EPSG:4326, but it cannot, so you'll have to use EPSG;31429. Unfortunately, gvSIG Mobile 0.3 is unaware of that projection, so the GPS arrow will not be placed correctly. Distance and area measurements will work correctly as long as you choose a projection whose map unit is the meter (for example the Italian EPSG:3003)

					I have tested that WMS server from the gvSIG Mobile 0.3 workspace in Eclipse and it worked fine choosing EPSG:31429. Have you tried that option? 

					As for the log file, yes you are right, that problem should be more visible in the log file, that's our fault.

					Go to Launcher.java and replace this line:

					Logger.getRootLogger().setLevel(Level.WARN);

					with:

					Logger.getRootLogger().setLevel(Level.ALL);

					Perhaps that'll show more messages.

					Regards,
					Juan Lucas Domínguez Rubio
					---
					Prodevelop SL, Valencia (España)
					Tlf.: 96.351.06.12 -- Fax: 96.351.09.68
					http://www.prodevelop.es <http://www.prodevelop.es/> 
					---

________________________________

					De: gvsig_internacional-bounces at listserv.gva.es en nombre de Schoolmeesters
					Enviado el: jue 30/09/2010 14:21
					Para: Users and Developers mailing list
					Asunto: [Gvsig_english] gvSIG Mobile workspace - getting "WMS image error" after trying to load files from WMS

					  Dear list,

					anybody out there who has tried to load a WMS with the source code
					running in Eclipse?

					I've tested the downloadable WinXP version -> no problems apart from the
					language which seems to be spanish only. However, that doesn't matter,
					but I don't understand why my self-compiled version does not load any
					WMS image. Is it possible that the SVN version is not the current
					version? Or did I forget to include something?

					Best regards,

					Marcel Schoolmeesters
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