Re: [Qgis-user] 1928-1930 USGS maps (Nicolas Cadieux)

[Jan Becket]

Yes, the min/max values are between 0 and 1. This is strange, because when I 
open the file in Photoshop (and then exit without saving), it is an 8-bit 
grayscale. I actually have two sets of 1928-30 USGS geotiffs for the island of 
Oahu. The set I was able to mount contains 16 geotiff files for each of the 16 
quads that are 4-5 mb in size. The other set contains 16 geotiff files that are 
about 125 mb each, and clearly grayscale. These USGS quads, however, have 
collars and are less desirable for that reason. In any case, they are not 
visible when I attempt to import / mount them. In case anyone has a suggestion, 
I have placed the Honolulu quad for both sets of maps in this dropbox folder: 
https://www.dropbox.com/sh/te9et5yuery207d/AAAYnBBkBzUod53RauD7ArTda?dl=0 


As far as I can tell, the CRS for both sets of maps is Old Hawaiian. I think I 
mentioned earlier that I am reprojecting to CRS 3711: NAD 83, UTM zone 4N.

Thanks, as always, for suggestions -
Jan




> Message: 1
> Date: Sat, 2 Jan 2016 15:58:12 -0800 (PST)
> From: Nicolas Cadieux 
> To: qgis-user@lists.osgeo.org
> Subject: Re: [Qgis-user] 1928-1930 USGS maps
> Message-ID: <3dea9563-0b69-4d5a-a75e-de74a61db...@email.android.com>
> Content-Type: text/plain; charset="utf-8"
> 
> Good but weird. 
> If you look at the histogram, are all values between 0 and 1? 
> Nicolas Cadieux M.Sc. 
> Les Entreprises Archotec inc. 
> 8548, rue Saint-Denis Montral H2P 2H2 
> Tlphone:514.381.5112 Fax: 514.381.4995 
> www.archeotec.ca 
> On Dec 28, 2015 17:29, William Kyngesburye [via OSGeo.org]   
> ml-node+s1560n5243130...@n6.nabble.com wrote: 
> 
>   Max 1?  Odd for a greyscale image.  Or are they 1bit images?
> At least its working.
>  On Dec 28, 2015, at 4:12 PM, Jan Becket  [hidden email]  wrote:
>  
>  With your suggestions and those of Nicolas I was able to make the maps 
> appear. I trashed the copies I had altered in Photoshop, loaded the original 
> (black) images, set the min as 0 and the max as 1 and then stretched to 
> min/max. That turned out to be easy. Thanks for the help!
>  
>  - Jan
>  
>  
>  On Dec 28, 2015, at 4:42 AM, William Kyngesburye  [hidden email] 
>  wrote:
>  
>  Or, QGIS should be able to read 16bit greyscale images without 
> breaking them with Photoshop.  You just need to set a min and max to include 
> the 16bit range and stretch the contrast to minmax.  Make sure you are not 
> using QGIS 2.10 - that had a broken raster styling on OS X.
>  
>  Alternately, use GDAL to convert to 8bit, not Photoshop.  
> gdal_translate -scale -ot Byte should do it (in Terminal, I 
> dont see the -scale or -ot options in QGIS GDAL convert format).
>  
>  On Dec 28, 2015, at 12:53 AM, Nicolas Cadieux  [hidden 
> email]  wrote:
>  
>  Hi,
>  You are correct, you have stripes the CRS info from the map 
> because Photoshop does not know what to do. If you load the map, you can 
> click on raster.. Something... Gdal-info.  That should give you all the 
> tagged info left in the image.
>  
>  Load the map in QGIS and click on zoom to layer 
> extent.  If you still dont see it, make sure you are in a CRS that 
> is projected in meters.  You should be able to see it.  The map should be at 
> 0,0.
>  
>  All is not loss...  You can reproject the map to the correct CRS 
> using the gdal georeferencing tool.Always back up your data before 
> manipulating it.
>  Hope this helps!
>  
>  Nicolas Cadieux M.Sc.
>  Les Entreprises Archéotec inc. 
>  8548, rue Saint-Denis Montréal H2P 2H2
>  Téléphone: 514.381.5112  Fax: 514.381.4995
>  www.archeotec.ca
>  
>  On Dec 28, 2015 01:16, Jan Becket [via OSGeo.org] 
> [hidden email] wrote:
>  After much effort, I obtained an old set of 1928-1930 USGS topo 
> maps of Oʻahu Island, Hawaiʻi - for a project I am working on. The maps are 
> without collars and used by a local archaeological firm. The geotiff maps at 
> first showed as completely black on my Mac system (10.10.5 - Yosemite). 
> However I found this link with a resultuion for the issue:
>  
>  
> http://stackoverflow.com/questions/13925995/options-to-convert-16-bit-image 
>  
>  I opened the 16 quads for Oʻahu in Photoshop and applied auto 
> levels, after which they became discernable quad maps. However, when imported 
> into QGIS, they are now invisible. I wonder if it is possible that I stripped 
> away the geotiff CRS information. Prior to the Photoshop operation, the maps 
> did appear correctly referenced to Oʻahu Island (although they were totally 
> opaque / black).
>  
>  Now, the maps in QGIS are not visible, although the geotiffs are 
> several megabytes in size and are visible when opened in Photoshop, Preview, 
> or whatever image viewer. 
>  
>  I should mention that I have successfully imported other sets of 
> USGS maps of Oʻahu for this project - the 1902 series, the 1916 series, the 
> 1935 series - as well as the current 

Re: [Qgis-user] QConsolidate for QGIS 2.12 64bit?

[Johanna Botman]

Many thanks [as she slaps her forehead]!!

___
Johanna Botman



From:   Salvatore Larosa 
To: Johanna Botman ,
Cc: QGIS User 
Date:   05/01/2016 09:00 AM
Subject:Re: [Qgis-user] QConsolidate for QGIS 2.12 64bit?



Hi,


Il 04/Gen/2016 22:47, "Johanna Botman" 
ha scritto:
>
> Hi,
>
> I have QGIS 2.12 installed on my new Win 10 64 bit laptop.
>
> I want to use QConsolidate to share a project with someone but it does
not come up on the list of plug ins.
>
> How else can I get this very helpful little tool?


QConsolidate plugin is marked  as experimental, so you have to check the
checkbox that says show also experimental plugins in the settings of the
plugin installer in order to see and install the plugin.


Regards,
-SL


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Re: [Qgis-user] QConsolidate for QGIS 2.12 64bit?

[Nicolas Cadieux]

Hi, 
Activate the experimental plugins to see if it helps then recheck. 
Cheers 
Nicolas Cadieux M.Sc. 
Les Entreprises Archotec inc. 
8548, rue Saint-Denis Montral H2P 2H2 
Tlphone:514.381.5112 Fax: 514.381.4995 
www.archeotec.ca 
On Jan 4, 2016 4:36 PM, Johanna Botman-2 [via OSGeo.org]   
ml-node+s1560n524368...@n6.nabble.com wrote: 


Hi, 

I have QGIS 2.12 installed on my new Win 10 64 bit laptop. 

I want to use QConsolidate to share a project with someone but it does not come 
up on the list of plug ins. 

How else can I get this very helpful little tool? 

___ 
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does not warrant or guarantee this message to be free of errors, interference, 
viruses or similar malicious code and does not accept liability for any 
consequences to the recipient opening or using this email or 
attachments. 
This email was scanned and cleared by 
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[Qgis-user] QConsolidate for QGIS 2.12 64bit?

[Johanna Botman]

Hi,

I have QGIS 2.12 installed on my new Win 10 64 bit laptop.

I want to use QConsolidate to share a project with someone but it does not
come up on the list of plug ins.

How else can I get this very helpful little tool?

___
Johanna Botman
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Views expressed in this e-mail are those of the individual, except 
where specifically stated otherwise. If this e-mail has been sent to 
you in error, please delete the e-mail completely and immediately from 
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Re: [Qgis-user] QConsolidate for QGIS 2.12 64bit?

[Salvatore Larosa]

Hi,

Il 04/Gen/2016 22:47, "Johanna Botman" 
ha scritto:
>
> Hi,
>
> I have QGIS 2.12 installed on my new Win 10 64 bit laptop.
>
> I want to use QConsolidate to share a project with someone but it does
not come up on the list of plug ins.
>
> How else can I get this very helpful little tool?

QConsolidate plugin is marked  as experimental, so you have to check the
checkbox that says show also experimental plugins in the settings of the
plugin installer in order to see and install the plugin.

Regards,
-SL
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[Qgis-user] Problem using DIFFERENCE

[Susan Iremonger]

Hi I am having trouble erasing part of a file by using another file as a
mask and the tool Difference. I have a habitat map and I want to erase the
part of the habitat map that is within a conservation area. So I have two
shapefiles, one of habitats polygons and the other of conservation area
polygons. I have tried using Difference, but it doesn't work, it has left
me with the same data as the input file. Does anyone know of a fix for this
that might work? I have tried doing this a different way, using Select etc,
but I can't seem to do it. Any help much appreciated.
Many thanks.
--Susan.
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[Qgis-user] Help with multiple selection for actions (Run Feature Tool)

[h]

Hi,
I keep thinking I'm a noobie, but perhaps have moved beyond in some
areas.
What I have done is added my own action in the action list for a vector
layer.  The action passes a 'primary key' attribute to a local web
server which creates a custom report on the feature selected.
This all works, and was surprisingly easy to set up-  thankyou.

What I now want to do is be able to select multiple features, have all
the 'primary key' attributes passed to the web server, allowing  the
production of reports based the features select.  I have a number of
things I'd like to try, but frequency diagrams is one example.

From reading the help I think the "Run Feature Tool" should work on a
collection of features, but I cannot figure out how to select the
features.  

Some help and direction would be greatly appreciated.

(I am running "master" on the latest opensuse x86_64)

H



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Re: [Qgis-user] Message box "Unknown error"

[PIERRE Sylvain]

Thanks

But qml file is not corrupt and I can load it in QGIS with 2.6 and 2.8 release 
(with 2.10 and 2.12 I can’t!)

De : Qgis-user [mailto:qgis-user-boun...@lists.osgeo.org] De la part de Nicolas 
Cadieux
Envoyé : lundi 4 janvier 2016 17:32
À : qgis-user@lists.osgeo.org
Objet : Re: [Qgis-user] Message box "Unknown error"


Salut Pierre,
Never had that problem but the qml file is a text file.  You can look at it 
using notepad++ (or whatever text editor) and see if the file is corrupt...

Nicolas Cadieux M.Sc.
Les Entreprises Archéotec inc.
8548, rue Saint-Denis Montréal H2P 2H2
Téléphone: 514.381.5112  Fax: 514.381.4995
www.archeotec.ca
On Jan 4, 2016 11:19, "PIERRE Sylvain [via OSGeo.org] " <[hidden 
email]> wrote:

Hello,



When trying to load a qml file  with complex polygon symbols saved with 2.6 
into 2.12 I got a small message box with “unknown error” (erreur inconnue in 
French)

Layer doesn’t display anymore and message still display until I remove the 
layer.



Is there anybody here experienced such problem?



Thanks



Sylvain



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Re: [Qgis-user] GeoServer online

[Alex Mandel]

On 01/04/2016 03:33 AM, "Sebastian Teßmer" wrote:
> Hello everybody,
> 
> and a Happy New Year!
> 
> I have a question for GeoServer. I use it as a Web server for my geodata.
> With "localhost" everything works great, but does anyone know how I
> the data online can call? I need an explanation on how I publish a Web server 
> on 
> the web?
> 
> Thank you for your help!
> Sebastian
> 
>

1. If this is about Geoserver, please ask on the Geoserver mailing list
http://geoserver.org/comm/
2. You need a Domain/Domain Name Server/Service (DNS) so that a url
points to your computer from the web (complicated if you don't have a
static ip for your computer, or your internet provide prevents hosting
on personal accounts). This is a general topic with lots of examples on
the internet to learn from. The basics are you pay for a domain, and
tell it the ip of your machine.

Enjoy,
Alex

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[Qgis-user] Message box "Unknown error"

[PIERRE Sylvain]

Hello,

When trying to load a qml file  with complex polygon symbols saved with 2.6 
into 2.12 I got a small message box with "unknown error" (erreur inconnue in 
French)
Layer doesn't display anymore and message still display until I remove the 
layer.

Is there anybody here experienced such problem?

Thanks

Sylvain

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[Qgis-user] QGIS 2.12: "Add Circular String" to PostGIS

[Ricardo Pinho]

Hi,
On the excellent 2.12 new feature: "Add circular string" (thanks
sourcepole) is stated that: "Note again that you need to be using a data
provider (e.g. PostGIS, GML or WFS) that supports curves."
http://qgis.org/en/site/forusers/visualchangelog212/#digitising

But I can only use it with PostGIS 2.1 geometry type: "COMPOUNDCURVE", that
doesn't accept lines (Linestring).

I've tried it with MULTICURVE but QGIS returns a commit error: "PostGIS
error while adding features: ERROR: Geometry type (CompoundCurve) does not
match column type (MultiCurve)"

Is it possible to use the "Add Circular String" QGIS 2.12 feature on a
PostGIS 2.1 geom table that stores line and curve features?

Thanks in advance,
Cheers,
-- 
Ricardo Pinho
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Re: [Qgis-user] 1928-1930 USGS maps (Nicolas Cadieux)

[Nicolas Cadieux]

Hi,
I looked at your files.  The borderless map are 8 byte file but they are 
Boolean value files 0 and 1 only (black and white file. No gray scale).  
In this case, 0 = data and 1 = no data??? (use the value plugin to see 
this).  So if you set your 1 values to no data (layer 
properties/transparency/additional no data value), and set your layer 
style from black to white (and not the default white to black) you will 
see that your data is well georeferenced. (use an open layer layer like 
osm or Google map as background.)

The files with borders (honolulu1928.tif) are Eight bit unsigned integer 
but they are on a gray scale so the vary between 0 and 255.   If you 
look at the geotagg, (raster/miscellaneous/info (see below) that the 
file has some georeferencing info like the crs but the coordinate are 
wrong (Corner Coordinates:
Upper Left  (0.0,0.0)).  So if you turn on the "CRS on the fly" 
and then zoom to the layer extent, you will see the map in the sea.  
It's not that the map does not appear... it's that it is in the wrong spot.

I also see this tag (TIFFTAG_SOFTWARE=Adobe Photoshop CS Windows). It is 
possible that Photoshp was used in the past and that it striped away the 
coordinates.  Since you have the coordinates on the map, you can use the 
gdal georeferencing plugin to place the map in the correct spot.
Good luck

Nicolas

==
Driver: GTiff/GeoTIFF
Files: C:/Users/Nicolas/Downloads/1928 Honolulu/honolulu1928.tif
C:/Users/Nicolas/Downloads/1928 Honolulu/honolulu1928.tif.aux.xml
Size is 12000, 10519
Coordinate System is:
PROJCS["NAD_1983_HARN_UTM_Zone_4N",
 GEOGCS["GCS_North_American_1983_HARN",
 DATUM["NAD83_High_Accuracy_Reference_Network",
 SPHEROID["GRS_1980",6378137.0,298.257222101]],
 PRIMEM["Greenwich",0.0],
 UNIT["Degree",0.0174532925199433]],
 PROJECTION["Transverse_Mercator"],
 PARAMETER["False_Easting",50.0],
 PARAMETER["False_Northing",0.0],
 PARAMETER["Central_Meridian",-159.0],
 PARAMETER["Scale_Factor",0.9996],
 PARAMETER["Latitude_Of_Origin",0.0],
 UNIT["Meter",1.0],
 AUTHORITY["EPSG","3750"]]
Metadata:
   TIFFTAG_DATETIME=2006:06:15 07:13:01
   TIFFTAG_RESOLUTIONUNIT=2 (pixels/inch)
*_TIFFTAG_SOFTWARE=Adobe Photoshop CS Windows_*
   TIFFTAG_XRESOLUTION=400
   TIFFTAG_YRESOLUTION=400
Image Structure Metadata:
   INTERLEAVE=BAND
_*Corner Coordinates:*__*
*__*Upper Left  (0.0,0.0)*__*
*__*Lower Left  (0.0,10519.0)*__*
*__*Upper Right (12000.0,0.0)*__*
*__*Lower Right (12000.0,10519.0)*_
Center  ( 6000.0, 5259.5)
Band 1 Block=12000x1 Type=Byte, ColorInterp=Gray
   Min=0.000 Max=255.000
   Minimum=0.000, Maximum=255.000, Mean=193.512, StdDev=41.612
   Metadata:
 LAYER_TYPE=athematic
 STATISTICS_MAXIMUM=255
 STATISTICS_MEAN=193.51169711538
 STATISTICS_MINIMUM=0
 STATISTICS_STDDEV=41.611752735755





Le 2016-01-04 03:04, Jan Becket [via OSGeo.org] a écrit :
> Yes, the min/max values are between 0 and 1. This is strange, because 
> when I open the file in Photoshop (and then exit without saving), it 
> is an 8-bit grayscale. I actually have two sets of 1928-30 USGS 
> geotiffs for the island of Oahu. The set I was able to mount contains 
> 16 geotiff files for each of the 16 quads that are 4-5 mb in size. The 
> other set contains 16 geotiff files that are about 125 mb each, and 
> clearly grayscale. These USGS quads, however, have collars and are 
> less desirable for that reason. In any case, they are not visible when 
> I attempt to import / mount them. In case anyone has a suggestion, I 
> have placed the Honolulu quad for both sets of maps in this dropbox 
> folder: 
> https://www.dropbox.com/sh/te9et5yuery207d/AAAYnBBkBzUod53RauD7ArTda?dl=0
>
> As far as I can tell, the CRS for both sets of maps is Old Hawaiian. I 
> think I mentioned earlier that I am reprojecting to CRS 3711: NAD 83, 
> UTM zone 4N.
>
> Thanks, as always, for suggestions -
> Jan
>
>
>
>
>> Message: 1
>> Date: Sat, 2 Jan 2016 15:58:12 -0800 (PST)
>> From: Nicolas Cadieux <[hidden email] 
>> >
>> To: [hidden email] 
>> Subject: Re: [Qgis-user] 1928-1930 USGS maps
>> Message-ID: <[hidden email] 
>> >
>> Content-Type: text/plain; charset="utf-8"
>>
>> Good but weird.
>> If you look at the histogram, are all values between 0 and 1?
>> Nicolas Cadieux M.Sc.
>> Les Entreprises Archotec inc.
>> 8548, rue Saint-Denis Montral H2P 2H2
>> Tlphone:514.381.5112 Fax: 514.381.4995
>> www.archeotec.ca 
>> On Dec 28, 2015 17:29, William Kyngesburye [via OSGeo.org 
>> ] [hidden email] 
>>  wrote:
>>
>> Max 1?  Odd for a greyscale image.  Or are they 1bit images?
>> At least its working.
>>  On Dec 28, 2015, at 4:12 PM, Jan Becket  [hidden email]  
>> wrote:
>> 
>>  With your suggestions and those of Nicolas I was able to make 
>> the maps appear. I trashed the copies I had altered in Photoshop, 
>> loaded the original 

Re: [Qgis-user] Message box "Unknown error"

[Nicolas Cadieux]

Salut Pierre, 
Never had that problem but the qml file is a text file. You can look at 
it using notepad++ (or whatever text editor) and see if the file is corrupt... 
Nicolas Cadieux M.Sc. 
Les Entreprises Archotec inc. 
8548, rue Saint-Denis Montral H2P 2H2 
Tlphone:514.381.5112 Fax: 514.381.4995 
www.archeotec.ca 
On Jan 4, 2016 11:19, PIERRE Sylvain [via OSGeo.org]   
ml-node+s1560n5243639...@n6.nabble.com wrote: Hello,   When trying to 
load a qml file  with complex polygon symbols saved with 2.6 into 2.12 I got a 
small message box with “unknown error” (erreur inconnue in French) Layer 
doesn’t display anymore and message still display until I remove the layer.   
Is there anybody here experienced such problem?   Thanks   Sylvain   
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