Anaconda install with OSGeo4W

I was coming across some errors when installing Anaconda, Miniconda specifically.

https://conda.io/miniconda.html

I think part of the reason is I have quite a few installs of Python due to OSGeo4W.

My error:

Fatal Python error: Py_Initialize: unable to load the file system codec
ModuleNotFoundError: No module named 'encodings'

Current thread 0x00002554 (most recent call first):

Fatal Python error: Py_Initialize: unable to load the file system codec

ModuleNotFoundError: No module named 'encodings'

Current thread 0x00002554 (most recent call first):

The solution:

Update the activate.bat file that is called when launching from the start menu. For me located in:

C:\ProgramData\Anaconda\Scripts

1	C:\ProgramData\Anaconda\Scripts

We need to add in the following to clear out and reset the python environment before launching anaconda:

@SET PYTHONPATH=
@SET PYTHONHOME=C:\ProgramData\Anaconda
@PATH C:\ProgramData\Anaconda;C:\ProgramData\Anaconda\Scripts;%PATH%

@SET PYTHONPATH=

@SET PYTHONHOME=C:\ProgramData\Anaconda

@PATH C:\ProgramData\Anaconda;C:\ProgramData\Anaconda\Scripts;%PATH%

So, editing the file from:

@REM Test first character and last character of %1 to see if first character is a "
@REM   but the last character isn't.
@REM This was a bug as described in https://github.com/ContinuumIO/menuinst/issues/60
@REM When Anaconda Prompt has the form
@REM   %windir%\system32\cmd.exe "/K" "C:\Users\builder\Miniconda3\Scripts\activate.bat" "C:\Users\builder\Miniconda3"
@REM Rather than the correct
@REM    %windir%\system32\cmd.exe /K ""C:\Users\builder\Miniconda3\Scripts\activate.bat" "C:\Users\builder\Miniconda3""
@REM this solution taken from https://stackoverflow.com/a/31359867
@set "_args1=%1"
@set _args1_first=%_args1:~0,1%
@set _args1_last=%_args1:~-1%
@set _args1_first=%_args1_first:"=+%
@set _args1_last=%_args1_last:"=+%
@set _args1=


@if "%_args1_first%"=="+" if NOT "%_args1_last%"=="+" (
    @CALL "%~dp0..\Library\bin\conda.bat" activate
    @GOTO :End
)

@CALL "%~dp0..\Library\bin\conda.bat" activate %*

:End
@set _args1_first=
@set _args1_last=

@REM Test first character and last character of %1 to see if first character is a "

@REM but the last character isn't.

@REM This was a bug as described in https://github.com/ContinuumIO/menuinst/issues/60

@REM When Anaconda Prompt has the form

@REM %windir%\system32\cmd.exe "/K" "C:\Users\builder\Miniconda3\Scripts\activate.bat" "C:\Users\builder\Miniconda3"

@REM Rather than the correct

@REM %windir%\system32\cmd.exe /K ""C:\Users\builder\Miniconda3\Scripts\activate.bat" "C:\Users\builder\Miniconda3""

@REM this solution taken from https://stackoverflow.com/a/31359867

@set "_args1=%1"

@set _args1_first=%_args1:~0,1%

@set _args1_last=%_args1:~-1%

@set _args1_first=%_args1_first:"=+%

@set _args1_last=%_args1_last:"=+%

@set _args1=

@if "%_args1_first%"=="+" if NOT "%_args1_last%"=="+" (

@CALL "%~dp0..\Library\bin\conda.bat" activate

@GOTO :End

)

@CALL "%~dp0..\Library\bin\conda.bat" activate %*

:End

@set _args1_first=

@set _args1_last=

To:

@REM Test first character and last character of %1 to see if first character is a "
@REM   but the last character isn't.
@REM This was a bug as described in https://github.com/ContinuumIO/menuinst/issues/60
@REM When Anaconda Prompt has the form
@REM   %windir%\system32\cmd.exe "/K" "C:\Users\builder\Miniconda3\Scripts\activate.bat" "C:\Users\builder\Miniconda3"
@REM Rather than the correct
@REM    %windir%\system32\cmd.exe /K ""C:\Users\builder\Miniconda3\Scripts\activate.bat" "C:\Users\builder\Miniconda3""
@REM this solution taken from https://stackoverflow.com/a/31359867
@set "_args1=%1"
@set _args1_first=%_args1:~0,1%
@set _args1_last=%_args1:~-1%
@set _args1_first=%_args1_first:"=+%
@set _args1_last=%_args1_last:"=+%
@set _args1=

@SET PYTHONPATH=
@SET PYTHONHOME=C:\ProgramData\Anaconda
@PATH C:\ProgramData\Anaconda;C:\ProgramData\Anaconda\Scripts;%PATH%

@if "%_args1_first%"=="+" if NOT "%_args1_last%"=="+" (
    @CALL "%~dp0..\Library\bin\conda.bat" activate
    @GOTO :End
)

@CALL "%~dp0..\Library\bin\conda.bat" activate %*

:End
@set _args1_first=
@set _args1_last=

@REM Test first character and last character of %1 to see if first character is a "

@REM but the last character isn't.

@REM This was a bug as described in https://github.com/ContinuumIO/menuinst/issues/60

@REM When Anaconda Prompt has the form

@REM %windir%\system32\cmd.exe "/K" "C:\Users\builder\Miniconda3\Scripts\activate.bat" "C:\Users\builder\Miniconda3"

@REM Rather than the correct

@REM %windir%\system32\cmd.exe /K ""C:\Users\builder\Miniconda3\Scripts\activate.bat" "C:\Users\builder\Miniconda3""

@REM this solution taken from https://stackoverflow.com/a/31359867

@set "_args1=%1"

@set _args1_first=%_args1:~0,1%

@set _args1_last=%_args1:~-1%

@set _args1_first=%_args1_first:"=+%

@set _args1_last=%_args1_last:"=+%

@set _args1=

@SET PYTHONPATH=

@SET PYTHONHOME=C:\ProgramData\Anaconda

@PATH C:\ProgramData\Anaconda;C:\ProgramData\Anaconda\Scripts;%PATH%

@if "%_args1_first%"=="+" if NOT "%_args1_last%"=="+" (

@CALL "%~dp0..\Library\bin\conda.bat" activate

@GOTO :End

)

@CALL "%~dp0..\Library\bin\conda.bat" activate %*

:End

@set _args1_first=

@set _args1_last=

Updating the paths as required.

This just clears out the python and windows environmental variables before launching, similar to what OSGeo4W does.

Ireland and Dublin Street Orientations

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Based on the work by:

Geoff Boeing: Comparing City Street Orientations

Rixx: Street Orientations

The graphs show the percentage of streets that run in a certain orientation. So for a grid based city like Chicago, there will be a heavy bias in north/south and east/west streets. Bearing in mind north and south will be the same (unless there are one-way streets, which only count in the direction they run in).

But for older cities that formed naturally, without modern city planning, the streets should be more varied.

Ireland:

Largest populated places by population. Based on the Ordnance Survey Ireland urban areas. As it is OSI data, Northern Ireland is not included.

Dublin Postcodes:

Some areas are clearly impacted by large motorways running through them.

And for non-Dubliners, a map of the postal district boundaries:

I updated the script by Rixx, so that it would take a ShapeFile as an input with a few caveats (it must be WGS84, it must have an attribute that has the are name and it must be called settl_name).

Check out the script at: GitHub

Stanley Cup Champions Since 1915

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Stanley Cup Champions Since 1915:

Average Location of Stanley Cup Champions Since 1915:

The average locations were created using a window function in PostgreSQL. We can utilise the geography type to take into account the curvature of the earth and make the calculation on a spheroid.

So for the average location of the last five years:

select id,
ST_Centroid(st_collect(geom)
over (ORDER BY id ROWS BETWEEN 4 PRECEDING AND CURRENT ROW)::geography,
True)::geometry as five_year_cent
from nhl.winner_1915

select id,

ST_Centroid(st_collect(geom)

over (ORDER BY id ROWS BETWEEN 4 PRECEDING AND CURRENT ROW)::geography,

True)::geometry as five_year_cent

from nhl.winner_1915

QGIS OpenStreetMap Scales

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Save as a text file ending in .xml like qgis_scales.xml

These are the scales OpenStreetMap tiles are rendered in for 96 dpi, so the map will look sharp on most monitors.

The xml file can then be loaded into the project from:

Project> Project Properties…> General> Project scales

<qgsScales version="1.0">
    <scale value="1:554678932"/>
    <scale value="1:277339466"/>
    <scale value="1:138669733"/>
    <scale value="1:69334866"/>
    <scale value="1:34667433"/>
    <scale value="1:17333716"/>
    <scale value="1:8666858"/>
    <scale value="1:4333429"/>
    <scale value="1:2166714"/>
    <scale value="1:1083357"/>
    <scale value="1:541678"/>
    <scale value="1:270839"/>
    <scale value="1:135419"/>
    <scale value="1:67709"/>
    <scale value="1:33854"/>
    <scale value="1:16927"/>
    <scale value="1:8463"/>
    <scale value="1:4231"/>
    <scale value="1:2115"/>
</qgsScales>