maps

dependency

• gorm
• github.com/llgcode/draw2d -- draw2d's dependency has some problem with google code
• github.com/nferruzzi/gormGIS

Setup frameworks

Go install

• You can install Go Programming Language from here - Go
• Setting up $GOPATH and $GOROOT

revel install

• revel is web framework using Go.
• The official Site is here - https://revel.github.io/

But you can install revel using go command

# get revel framework
go get github.com/revel/revel

# get 'revel' command
go get github.com/revel/cmd/revel

# get samples and run chat app
go get github.com/revel/samples
revel run github.com/revel/samples/chat

make new application

You can make new web application using revel

revel new myNewMap

map settings

This project contains shape file.

You can also download shape files from

http://data.seoul.go.kr/openinf/mapview.jsp?infId=OA-365

It's Korean Gov. open data.

License is under BY(CC)

Author is Seoul Si(서울시)

shp2 -> postgis

SHP file is not UTF-8, 2 steps needed to be done

1. convert shape file to sql file shp2pgsql -I -W euc-kr -s 2097 <PATH/TO/SHAPEFILE> > SHAPEFILE.sql
2. sql loading psql -d -f SHAPEFILE.sql

Writing Go application

1. Make a mock code from revel command

  revel new myApp

once you execute this command, directoy structure will be shown below.

myapp/               App root
  app/               App sources
    controllers/     App controllers
      app.go         Sample Contoller
    views/           Templates
      App/           View Files
        index.html   Sample View File
      errors/        error file
    init.go          Interceptor registration
  tests/             Test suites
  conf/              Configuration files
    app.conf        Main configuration file
    routes          Routes definition
  messages/          Message files
  public/            Public assets
    css/             CSS files
    js/              Javascript files
    images/          Image files

2. Setting ORM tool for application You can set ORM tool like GORM, GORP

In this application, you will learn how to setup GORM

3. Make controller for maps

Test code authoring

Test URL authoring

test URL

http://localhost:9000/toilet?BBOX=177000%2C437000%2C219000%2C466000&SRS=EPSG:2097&WIDTH=1024&HEIGHT=768

Real code

Leaflet code

EPSG2097 settings

EPSG 2097 EPSG 2097 PROJCS["Korean 1985 / Korea Central Belt",GEOGCS["Korean 1985",DATUM["Korean_Datum_1985",SPHEROID["Bessel 1841",6377397.155,299.1528128,AUTHORITY["EPSG","7004"]],AUTHORITY["EPSG","6162"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4162"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",38],PARAMETER["central_meridian",127],PARAMETER["scale_factor",1],PARAMETER["false_easting",200000],PARAMETER["false_northing",500000],AUTHORITY["EPSG","2097"],AXIS["X",NORTH],AXIS["Y",EAST]] +proj=tmerc +lat_0=38 +lon_0=127 +k=1 +x_0=200000 +y_0=500000 +ellps=bessel +units=m +no_defs