https://github.com/neizod/cnx-eats

GIS analysis on Chiang Mai restaurants and where to starts new place.
https://github.com/neizod/cnx-eats

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GIS analysis on Chiang Mai restaurants and where to starts new place.

• Host: GitHub
• URL: https://github.com/neizod/cnx-eats
• Owner: neizod
• License: mit
• Created: 2014-03-16T22:37:28.000Z (over 10 years ago)
• Default Branch: master
• Last Pushed: 2016-08-05T21:28:46.000Z (over 8 years ago)
• Last Synced: 2023-03-12T07:48:26.058Z (over 1 year ago)
• Language: CoffeeScript
• Size: 120 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.rst
  • License: LICENSE.txt

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README

        
============================================

Chiang Mai Restaurants for Students Analysis

============================================

GIS Analyse Steps

=================

1. Buffer universities to create students distribution model.

  - Make 3 buffer to simulate bell-curve at sd=[1,2,3].

  - Each buffer distance is increased by 0.0085 (~1km), set seg-approx=9.

2. Each universities buffer do minus to obstacles polygon.

3. Also each universities buffer do minus its campus area.

4. Fill points into each buffer by rates of distributed students.

  - Set CRS of their layers to 4326 to view them correctly.

5. Merge points layer into one layer, a student-model-distribution layer.

6. Buffer restaurants distance of 0.001, fill with check-ins, count in grid.

7. Create polygon vector grid that cover student points, set width=0.005.

  - Also make attr weight of type decimal precision=5, will use later.

8. Count student/restaurant points in grid, compute its weight.

9. Compute student weight minus restaurant weight (database script).

Requirement

===========

- Apache 2.4

- PHP 5.4

- PostgreSQL 9.3 with contrib package

- PostGIS 2.1

Setup Steps

===========

1. Prepare PostgreSQL Database

2. Create Empty PostGIS Database

3. Populate Database with Provided Data

Prepare PostgreSQL Database

---------------------------

Create new database and user in ``psql`` by this spec::

    CREATE DATABASE gis;

    CREATE USER gman PASSWORD 'whatawonderfulworld!?';

    ALTER DATABASE gis OWNER TO gman;

Grant access to database with database's password (not by using linux user).

Edit file ``/etc/postgresql/9.3/main/pg_hba.conf`` and add this spec::

    local   all             gman                                    md5

Restart database server.

Create Empty PostGIS Database

-----------------------------

Reconnect into postgresql w/ new db by command ``psql gis``::

    CREATE EXTENSION postgis;

    CREATE EXTENSION fuzzystrmatch;

    CREATE EXTENSION postgis_topology;

    CREATE EXTENSION postgis_tiger_geocoder;

Populate Database with Provided Data

------------------------------------

Load data tables from dump database::

    psql -U gman gis -f gis-data-dump.sql