Install QGIS to visualize GeoJSON

Give it a try in Terminal

$ brew install qgis

Error: No available formula for qgis 

No problem, you will find most of the needed frameworks here:

http://www.kyngchaos.com/software/frameworks

In addition to Mac .dmg files available above I am providing few Terminal commands you might need:

$  brew install gfortran

...

/usr/local/Cellar/gfortran/4.8.2: 960 files, 113M

 $ 

$ brew install pkg-config

Warning: pkg-config-0.28 already installed

$ 

$ brew install freetype

...

/usr/local/Cellar/freetype/2.5.3: 60 files, 2.5M

$ 

$ brew install libpng

Warning: libpng-1.5.18 already installed

$

$ brew install ffmpeg

/usr/local/Cellar/ffmpeg/2.1.4: 184 files, 34M

$ 

uki@.. Frameworks $  pip install matplotlib

-bash: pip: command not found

uki@.. Frameworks $ sudo easy_install pip

Password:

...

Best match: pip 1.5.4

...

Finished processing dependencies for pip

$  pip install matplotlib

Requirement already satisfied (use --upgrade to upgrade): matplotlib in /System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python

Cleaning up...

$ 

$ brew install gdal

...

Error: Homebrew doesn't know what compiler versions ship with your version

of Xcode (5.1.1). 

These open issues may also help:

libxml2 failed to build on 10.9.2 (https://github.com/Homebrew/homebrew/issues/28631)

$ 

$ brew install GEOS

...

/usr/local/Cellar/geos/3.4.2: 385 files, 8.4M, built in 2.2 minutes

$ 

$ brew install sqlite3

Warning: sqlite-3.8.3 already installed

uki@.. Frameworks $ 

$ brew install PROJ

Warning: proj-4.8.0 already installed

$ 

Install QGIS to visualize GeoJSON

Give it a try in Terminal

$ brew install qgis

Error: No available formula for qgis 

No problem, you will find most of the needed frameworks here:

http://www.kyngchaos.com/software/frameworks

In addition to Mac .dmg files available above I am providing few Terminal commands you might need:

$  brew install gfortran

...

/usr/local/Cellar/gfortran/4.8.2: 960 files, 113M

 $ 

$ brew install pkg-config

Warning: pkg-config-0.28 already installed

$ 

$ brew install freetype

...

/usr/local/Cellar/freetype/2.5.3: 60 files, 2.5M

$ 

$ brew install libpng

Warning: libpng-1.5.18 already installed

$

$ brew install ffmpeg

/usr/local/Cellar/ffmpeg/2.1.4: 184 files, 34M

$ 

uki@.. Frameworks $  pip install matplotlib

-bash: pip: command not found

uki@.. Frameworks $ sudo easy_install pip

Password:

...

Best match: pip 1.5.4

...

Finished processing dependencies for pip

$  pip install matplotlib

Requirement already satisfied (use --upgrade to upgrade): matplotlib in /System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python

Cleaning up...

$ 

$ brew install gdal

...

Error: Homebrew doesn't know what compiler versions ship with your version

of Xcode (5.1.1). 

These open issues may also help:

libxml2 failed to build on 10.9.2 (https://github.com/Homebrew/homebrew/issues/28631)

$ 

$ brew install GEOS

...

/usr/local/Cellar/geos/3.4.2: 385 files, 8.4M, built in 2.2 minutes

$ 

$ brew install sqlite3

Warning: sqlite-3.8.3 already installed

uki@.. Frameworks $ 

$ brew install PROJ

Warning: proj-4.8.0 already installed

$ 

PostgreSQL: postGIS functions

Change to Posgres (database user)

pi@raspberrypi /home/uki $ su postgres

Password: 

postgres@raspberrypi:/home/uki$

Select correct database

postgres@raspberrypi:/home/uki$  psql -d polygons

psql (9.1.12)

Type "help" for help.

polygons=#

To exit PostgreSQL shell

polygons=# \q

Select number of Points per Polygon in database

polygons=# select ST_NPoints(polygon) from polygon;

107ms on Respberry Pi

 st_npoints
------------
        132
        132
         12
          6
         26
         57
         15
          6
         18
         26
         19
          8
          6
          6
         14
         13
         10
         58
         10
          8
        171
        171

Select polygons for the GEO point

polygons=# select ST_NPoints(polygon) points from polygon where ST_Contains(polygon, ST_GeomFromText('POINT(-89.2535979 37.9210949)'));

Alternatively you can run query from Linux user prompt

postgres@raspberrypi:/home/pi$ psql -d polygons -c 'select ST_NPoints(polygon) from polygon;' 

If you testing timing of your query then you have to turn it on

polygons=# \timing

Timing is on.

polygons=# select ST_NPoints(polygon) from polygon;

Time: 17.256 ms

PostgreSQL: postGIS functions

Change to Posgres (database user)

pi@raspberrypi /home/uki $ su postgres

Password: 

postgres@raspberrypi:/home/uki$

Select correct database

postgres@raspberrypi:/home/uki$  psql -d polygons

psql (9.1.12)

Type "help" for help.

polygons=#

To exit PostgreSQL shell

polygons=# \q

Select number of Points per Polygon in database

polygons=# select ST_NPoints(polygon) from polygon;

107ms on Respberry Pi

 st_npoints
------------
        132
        132
         12
          6
         26
         57
         15
          6
         18
         26
         19
          8
          6
          6
         14
         13
         10
         58
         10
          8
        171
        171

Select polygons for the GEO point

polygons=# select ST_NPoints(polygon) points from polygon where ST_Contains(polygon, ST_GeomFromText('POINT(-89.2535979 37.9210949)'));

Alternatively you can run query from Linux user prompt

postgres@raspberrypi:/home/pi$ psql -d polygons -c 'select ST_NPoints(polygon) from polygon;' 

If you testing timing of your query then you have to turn it on

polygons=# \timing

Timing is on.

polygons=# select ST_NPoints(polygon) from polygon;

Time: 17.256 ms