Creating Custom Datasets

Podaris allows you to create and customise the appearance of datasets.

Datasets in Podaris are collections of GIS features that comprise a number of entities, each with a geographical location. These entities can take the form of polygons, linestrings or points and can contain a number of attributes of one of three types (string, number or boolean). Each entity may have values associated with each of its attributes.

Datasets allow you to put non-geographical data in a geographical context and use Podaris' geospatial analysis tools to perform sophisticated queries on the relationship between your datasets and the infrastructure in your project.

Creating a new dataset

In order to create a new dataset, click the layers tab, and then the add icon icon next to datasets.

create new dataset

When the Data Layer Settings modal opens, you can title and colour your data layer. This name and colour will be displayed on the layers panel.

Add data layer colour

Creating new entities with the draw tool

Once you have created your layer, select it from the list of datasets in the layer panel and click the Draw Tool.

Dataset draw

This will display the Tool: Draw panel.

Draw Tool

In the Tool: Draw panel, you will have the option to choose from one of three geometry types:

Point Point
Line Line
Polygon Polygon

Drawing polygons

After clicking the Polygon button, we can add connecting points on our map in order to create a complete polygon.

Create polygon

Drawing points

After clicking the button, we can add points on our map for each entity.

Points

Drawing lines

After clicking the button, we can add connecting points in order to form a linestring. This linestring will be completed on the map once the first and last points are connected together, or you press Enter

Linestring

Creating attributes

So far, we have seen how to draw entities with no associated attributes. Should we choose to create attributes, we must first click the cog button next to your new dataset layer.

Dataset settings

We then click Attributes and add entity to create a new attribute.

Note, that creating attributes is optional and we are able to create and use dataset entities in later isochrone queries without any associated attributes.

Information, attributes, styles and labels

All attributes require a name and a type. Available types are:

  • String
  • Number
  • Boolean

It is possible to enter a default value for each attribute. This is only a requirement for boolean attributes, which are true by default.

You may also create a list of allowed values for string and number types, as well as maximum and minimum values for number types.

Elderly Residents

Now, we can add an appropriate value for our chosen attribute and press Enter

Add value

Styling Datasets

Styling datasets can be achieved by clicking the cog icon cog next to the dataset layer that you wish to modify.

Styling datasets

The colour and stroke values of polygons, linestrings and points can all be styled here. In order to style string values that will be visible on your data layer next to each geometric element, select your preferred text attribute from the Labels box and style to your liking.

Viewing active layers

Clicking the visibility button next to your chosen data layer will allow you to enable or disable its visibility.

Active layers

Exporting Datasets

Datasets can be easily exported by clicking the checkbox next to the dataset you wish to export and clicking the Download button.

Export Dataset

Datasets can then be exported in a variety of formats.

 GeoJSON An open standard format designed for representing simple geographical features
 Shapefile An Esri vector data storage format for storing the location, shape, and attributes of geographic features
 KML An XML notation for expressing geographic annotation and visualization within two-dimensional maps

Copying and Rotating Dataset Geometry

Dataset geometry can be freely copied and rotated in the same manner as infrastructure using the copy and rotate tools.

Importing Datasets

This page has shown you how to create datasets from scratch in Podaris. You can find out how to import and customise existing datasets here.