If you want to play around with the Iso4App API and see all the features in action, we have built a web app for you to try out everything.

Toolbar on the web app

Icon	Description
	Map Zoom
	Find location by address/coordinates
	Massive isoline calculation. You can add your coordinates or you can load automatically the coordinates of Layer POIs shown on the map
	Distance Matrix calculation
	Join isolines on the map
	Download isolines in GeoJson format (one file)
	Download isolines in KML format (one file)
	Download isolines in KMZ format (one .ZIP file that contains one .kmz for each isoline)
	Aerial distance between two points
	Save only visible or all Map Elements. After saving you can select it in the Scenario section.

Isochrone/Isodistance selection: you can select/deselect one or more isolines which are summarized in the info window:

Isochrones selection	Info window

Marine Isodistance selection: you can select only one distance:

Advanced parameters: Google Places search. The default search is performed by Esri search, but you can use also the OSM Nominatim or Google Places search

Advanced parameters: Constraint Polygon.

As you can see in the previous sceenshoot you can add a your custom polygon (kml or kmz) to the map. This polygon will be showed in dotted format and the subsequent isolines will be bound to this constraint polygon.

Constraint polygon file selection	Constraint polygon on the map	Constraint polygon with bounded isolines

Points of interest: in this section you can view the system POIs by selecting one or more system layers or you can add your POIs adding a custom layer. Only your API-Key can view the added layers. The custom layer are not public. Grouping POIs feature is available. If on the map there are isolines you have the option to show only POIs inside it. You can choose the pin color for each selected layer or to go in the map zone where the POIs layer are present. Using the right mouse menu you can draw isolines on it. If you open the massive isoline window, with a single click you can calculate isolines for each POI in the map.

Points of interest layers

Map elements : in this section you can view the list of object present on the map. Map elements are: isochrones and isodistances polygons, isochrones and isodistances street network and thematic map. POIs are not considered map elements so you have to manage it using the section Points of interest. For each map element you can hide/show/remove it or to go in the map zone where the element is present. Restriction: you can have more thematic map, however only one at a time can be shown on the map, because each thematic map has its legend.

Maps elements

Scenario : in this section you can view the list of scenario that you saved. A scenario is a collection of Map Elements that you have saved by giving it a name. Selecting a scenario it will be displayed on the map and the each element will be the original ones and not recalculated. After selection each elements will be inserted in the Map Elements section.You can Hide/Show these elements, but you cannot remove it. You can Show/Hide/Remove the whole scenario from its section.
When you save a scenario in which there are active Points of interest layers, only the POIs that are currently visible on the map will be saved and not all the POIs of the selected layer.
Each saved scenario is linked to your API-Key, only you can see it.

Scenario section

Scenario Feature Video Tutorial

Some use cases

• 400 meters around a London school
• Reachability isolines
• Statistical Indicator
• Finding points of interest

Total ban on fast-food outlets within 400m of London schools, Mayor Sadiq Khan to announce.

The question is: how to calculate correctly the 400 meters walking around a school?

Answer: use iso4app service as showed into the animated image.

1) Find the school
2) Analyze the streets around the school
3) Click on one or more points
4) Join the resulting polygons
4) Get the final GeoJson polygon

You can study the reachability in time or distance from a given starting point.

In the example the pedestrian reachability from the center of Rome at intervals of 2 minutes.

Within your isoline you can represent a statistical indicator.
Suppose you have to open a new store and that you have the demographic data of your region.
You can represent your demographics within your isoline.

In the example a thematic map within an isodistance starting from the Italian ISTAT demographic data of the last census.

Suppose you want to know the gas stations that you can reach by car in less than 3 minutes.

If you have the POI database you can use our isolines to provide this type of service to your users.

You can use Iso4App also on ArcGis Web AppBuilder. Below you can download the Iso4App widget that you can include in your ArcGis application.

Unzip the Iso4app.zip file. After unpacking you will find the Iso4App directory, copy it to the Web AppBuilder configuration directory ArcGISWebAppBuilder\client\stemapp\widgets. Then restart Web AppBuilder.

On Web AppBuilder create a new Web App, select the Widget section and add the Iso4App Widget selecting it from the list.

You can use Iso4App also on QGIS Desktop platform. You can install the Plugin directly from QGIs Plugins->Manage and Install Plugins... Search iso4app, select and install it. You can also download the Iso4App Python plugin zip file from https://github.com/ksolsrl/QgisIso4app. You have to unzip and copy it under the python plugin folder. Restart QGis and enable the plugin from Plugins->Manage and Install Plugins...


This plugin is compatible with QGis 3.X

Plug-in parameters.

Notes:
Isoline Type: you can select the type of isoline to display: Isochrone or Isodistance.
Common parameters: we suggest to keep checked the option Restricted areas. A set of many conditions defines a restricted road: roads that can be closed at certain times, reserved lanes, port areas or service areas, roads with access limits, ....
Isochrone parameters: Speed type: set Very low for intense traffic, set Low for medium traffic, set Normal for little traffic, set Fast in this case the maximum speed allowed on the road is used. Reduce queue time:use it if you can skip the queue at a traffic light, for example if you drive a moped or an ambulance. Speed limit: if your veichle cannot exceed a specific speed (Ex. a truck 80 kmh, a moped 50 kmh,...) you can set this parameter.
Specific pedestrian and bike parmeters: in UK we suggest to keep checked Pedestrian and bicycle on trunk.
Isodistance parmeters: Fastes Route: this option uses the fastest roads and not the shortest roads.
Output types: Polygon: you have a polygon.Street Network: you have a set of segments over the map roads.
Polygon attributes: Concavity: 0 is a convex, higher values result in a more concave polygon. Buffering: enlarges the polygon by about 10 meters for each unit
Demographics: Add population as Attribute Table: valid only for output=polygon if the isoline is in a country where the population is available the attribute population will be added in the Attribute Table

How to calculate massive isolines from multiple points contained on your own layer.

An example of layer (MyLayer) containing points.

From iso4app menu select Massive Isoline Calculation.

From the opened panel select a layer (in this case MyLayer).

You have a Layer points list. For automatic layer name based on attributes value select an attribute from the combo, otherwise write your preferred layer name. In addition you can: 1) select an attribute to add, for each polygon, in the attribute tables; 2) use your attribute as a distance (it will be read as meters for isodistances or minutes for isochrones).

Before click on Calculate Isolines check well if the isoline parameters are set as you wish. Below the new isolines layer

The attribute table of the new layer.

Iso4app plugin for QGIS resources:

How to draw isochrones and isodistances.

Massive isodistances calculation from your layer.

Massive isochrones calculation with a different travel time for each point.

You can use Iso4App to calculate the distance or time matrix. In the isoline parameters panel by setting isochrone, and all related parameters, you will have a matrix of travel times in seconds, by setting isodistance, and the related parameters, you will have a matrix of the distances in meters. Based on the parameters, it will be possible to calculate the distance or time matrix for motor vehicle, bicycles or pedestrians.

Steps to use distance matrix:

Setting isoline parameters and your API-Key

Click on the Distance Matrix icon located on the right side of the web app:

On the Distance Matrix panel enter the starting coordinates (FROM) and the arrival coordinates (TO). Sintax: latitude1 longitude1;latitude2 longitude2; and so on...

Click on START button, the working in progress calculation will be updated. If you need to stop processing click on STOP button

At the end of the processing, click on CLOSE, the Distances Matrix table will be shown, you can copy the table on clipboard using the copy icon

Checking your points on the map: the starting points are gray with a blue dot, the arrival points are gray with a red dot; moving the mouse over an element of the table, the relative starting point becomes blue with a white dot and the end point becomes red with a white dot.

Click on X icon to remove the table, the points on the map will be removed.

Restriction: maximum distance 300 kilometers, maximum time 3 hours, the points must belong to the same connected graph