GeoTools Connector

Fast and reliable way to analize geospatial data.

This connector is used for easier access to GeoTools web service.

Installation

This is a Node.js module available through the npm registry.

Before installing, download and install Node.js. Node.js 0.10 or higher is required.

If this is a brand new project, make sure to create a package.json first with the npm init command.

Installation is done using the npm install command:

$ npm install geotoolsconnector

Features

• Geospatial analysis
  • Dissolve
  • Intersection
  • Centroid
  • Difference
  • Polygonize
  • Contours
  • Simplify
  • Multipart to singleparts
• Pipe reqests
• GUI for testing

Quick Start

After you have installed GeoTools Connector to your project, you have access to its features.

Simple example:

var connector =  require('geotoolsconnector');

var GeoTools =  new  connector(true); // setting enableGUI to true 

var centroid = GeoTools.centroid(myData); // myData needs to be formatted correctly

A simple GUI will become avaliable at http://localhost:4444 if you enable the enableGUI option when initializing GeoTools Connector.

More on how the data should look like and how API works on GeoTools API Docs or see the examples down below.

Example of geospatial analysis

Dissolve

myData = {
  "BY": [
    "SIFKO",
    "RANG"
  ],
  "DATA": {
    "type": "FeatureCollection",
    "features": [
      {
        "type": "Feature",
        "properties": {
          "SIFKO": "2391",
          "PARCELA": "2765/14",
          "RANG": "30"
        },
        "geometry": {
          "type": "MultiPolygon",
          "coordinates": [
            [
              [
                [
                  412315.79,
                  83594.22
                ],
                [
                  412316.46,
                  83598.8
                ],
                [
                  412319.57,
                  83598.16
                ],
                [
                  412318.8,
                  83593.5
                ],
                [
                  412315.79,
                  83594.22
                ]
              ]
            ]
          ]
        }
      }
    ]
  }
}

var dissolved = GeoTools.dissolved(myData);

console.log(dissolved);

Output:

{
  "features": [
    {
      "geometry": {
        "coordinates": [
          [
            [
              412315.79,
              83594.22
            ],
            [
              412316.46,
              83598.8
            ],
            [
              412319.57,
              83598.16
            ],
            [
              412318.8,
              83593.5
            ],
            [
              412315.79,
              83594.22
            ]
          ]
        ],
        "type": "Polygon"
      },
      "id": "0",
      "properties": {
        "PARCELA": "2765/14",
        "RANG": "30",
        "SIFKO": "2391"
      },
      "type": "Feature"
    }
  ],
  "type": "FeatureCollection"
}

In the same manner all the avaliable geospatial analysis can be done. For more details about format of the request body check out the API documentation.

Example of pipe request

Pipe request is a special way to send multiple requests in a row and use results of previous analysis without storing any data in between requests.

myPipeData = {
    "Data":
        [
            {
                "Tag": "A",
                "Value": {
                    "type": "FeatureCollection",
                    "name": "poly1",
                    "crs": { "type": "name", "properties": { "name": "urn:ogc:def:crs:OGC:1.3:CRS84" } },
                    "features": [
                        { 
                            "type": "Feature", 
                            "properties": {}, 
                            "geometry": { 
                                "type": "Polygon", 
                                "coordinates": [
                                    [
                                        [-1.64941176470587, 0.672941176470587], 
                                        [-2.284705882352929, -0.625882352941178], 
                                        [-1.148235294117635, -1.225882352941178], 
                                        [0.34823529411766, -0.477647058823531], 
                                        [-1.64941176470587, 0.672941176470587]
                                    ]
                                ] 
                            } 
                        }
                    ]
                }
            },
            {
                "Tag": "B",
                "Value": {
                    "type": "FeatureCollection",
                    "name": "poly2",
                    "crs": { "type": "name", "properties": { "name": "urn:ogc:def:crs:OGC:1.3:CRS84" } },
                    "features": [
                        { 
                            "type": "Feature", 
                            "properties": {}, 
                            "geometry": { 
                                "type": "Polygon", 
                                "coordinates": [
                                    [
                                        [-0.44941176470587, 0.658823529411763], 
                                        [-1.021176470588223, -0.484705882352943], 
                                        [-0.230588235294105, -1.776470588235295], 
                                        [1.95058823529413, -1.684705882352942], 
                                        [-0.44941176470587, 0.658823529411763]
                                    ]
                                ] 
                            } 
                        }
                    ]
                }

            }
        ],
    "Process":
        [
            { "Type": "Intersection", "Input1": "A", "Input2": "B", "Result": "C" },
            { "Type": "Centroid", "Input": "C", "Result": "D" }
        ],
    "Result":
        [
            "C", "D"
        ]
}

var pipeResults = GeoTools.pipe(myPipeData);

console.log(pipeResults);

output:

[
    {
        "Tag": "C",
        "Value": {
            "features": [
                {
                    "geometry": {
                        "coordinates": [
                            [
                                [
                                    0.34823529411766,
                                    -0.477647058823531
                                ],
                                [
                                    -0.7036180162441421,
                                    -1.0035737140044316
                                ],
                                [
                                    -1.021176470588223,
                                    -0.484705882352943
                                ],
                                [
                                    -0.7122440087145844,
                                    0.13315904139433424
                                ],
                                [
                                    0.34823529411766,
                                    -0.477647058823531
                                ]
                            ]
                        ],
                        "type": "Polygon"
                    },
                    "id": "0",
                    "properties": {},
                    "type": "Feature"
                }
            ],
            "type": "FeatureCollection"
        }
    },
    {
        "Tag": "D",
        "Value": {
            "bbox": [
                -0.4604118457228069,
                -0.4498927572241431,
                -0.4604118457228069,
                -0.4498927572241431
            ],
            "features": [
                {
                    "bbox": [
                        -0.4604118457228069,
                        -0.4498927572241431,
                        -0.4604118457228069,
                        -0.4498927572241431
                    ],
                    "geometry": {
                        "coordinates": [
                            -0.4604118457228069,
                            -0.4498927572241431
                        ],
                        "type": "Point"
                    },
                    "id": "0",
                    "properties": {},
                    "type": "Feature"
                }
            ],
            "type": "FeatureCollection"
        }
    }
]