Merge polygons features online using IGISMap

In GIS data, a geographic area is represented in a polygon shape. Geospatial features such as administrative boundaries are digitized in the polygon vector model. In some cases, we need to merge the polygon features based on attribute values or location. After merging, input polygons will merge into a single polygon feature assigned with a single row to store attribute values. When the adjacent polygons with common border lines are merged, they combine to form a single polygon. Through merge functionality, we can create any primary-level administrative boundaries like national boundaries from the secondary level divisions like state or district level boundaries. So here in this article, we are providing steps to merge polygons features online in a single layer.

Merging is a common geoprocessing used in GIS projects for two important cases. One is to merge multiple GIS features into single GIS feature within a GIS data itself. Another application is to merge multiple GIS data into single GIS data. In both cases, geometry entity of the input GIS feature or GIS data should be same ie., either point, polyline or polygon.

IGISMap provides Merge Polygons tool to merge multiple polygon features of a polygon GIS data into single polygon feature. IGISMap is a GIS-based web platform, that provides multiple GIS applications that are most important in the field of geospatial analytics. The peculiarity of IGISMAP in the GIS Industry is its user interface which helps the user to perform effortless geospatial operations. Merge Polygons tool is very easy to use and you can merge the required polgons in just two steps.

In this article we will create the national boundary of USA by merging the polygons of state boundaries. Without further due, lets dive into Merge Polygons tool.

Click to open Merge Polygons tool.

Add your data

After opening Merge Polygons tool, first step is to add or upload polygon GIS data. Here we will choose Upload Data option to upload the data from your personal computer. Then, click on the Browse button to open the browsing box, where you will choose the file from your pc. In this article, we will be uploading a polygon GIS data of USA state level boundaries.

Upload Data
Upload Data

After opening the file, click the Upload button to start the upload process.

Uploading GIS data
Uploading GIS data

Check the article Add / Upload polygon GIS data and merge required polygon features to understand how to use IGISMap GIS data in Merge Polygons tool.

Select polygons using Lasso Tool

When uploading is complete, polygon GIS data of USA state level boundaries will be published in the map. This data will be selected as the input data for carying out the merge operation.

Select Lasso Tool
Select Lasso Tool

You can access this same data from IGISMap GIS Data collection through Add GIS Data option provided in the Data Selection section.

Click to access Add GIS Data tool directly

Click below to download polygon GIS data of USA state level boundaries

Download USA State Level Boundaries Shapefile

Next step is to select the required polygon features from the input polygon data. IGISMap provides two options to select the polygons. They are – Lasso Tool and Select Manually. Lasso Tool option is suitable to selecte large number of polygon features, hence we will select Lasso Tool tab.

Lasso Tool will open the list of modes to draw a polygon over the required polygon features. These are Draw Polygon With Free Hand, Draw Circle, Draw Rectangle, and Draw Polygon. Select Draw Polygon and draw a polygon intersecting all the polygons of the states.

Draw Polygon using Lasso Tool
Draw Polygon using the Lasso Tool

Polygon features of the input polygon GIS data that intersected by the lasso polygon will be selected for merging. Then click Submit to start merging.

Polygons selected using Lasso tool
Polygons selected using Lasso tool

Output polygon

After submitting, merged polygon GIS data of USA national ouline boundary is published in the map, as shown below

Merged Layer
Merged Layer

In the above article we uploaded polygon GIS data and merge polygons features online. But if you have point data you can also convert it into polygon by point to polygon conversion feature of IGISMap Tool. This is good if you have point data. If you don’t have data you can Create Point Data using our tool.

Check the article Share your Map to understand the Share Map feature of IGISMap.

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Check the following IGISMap tools:

Add / Upload polygon GIS data and merge required polygon features

For a GIS project, accessing the required data is the first step that determines the further workflow of the project. Online sources either provides the data or provide tools to work with data. There are very few web tools that provides important data and services to work with the data in a single platform. Yes, that is rightIGISMap is one of that kind, where you can find most demanding GIS data in vector formats with a number of tools to carry out analysis and other operations over the GIS data. In the article below we will how to add/upload data and merge polygons. In addition, to merge the feature you can add GIS Data i.e shapefile, kml, kmz, geojson etc.

GIS Data in IGISMap contains administrative boundaries such as country, states, districts, roads, railway lines, and other geographical features such as roads, farmlands, waterbody, etc. IGISMap gis data tool provides you data for 30+ countries, and 51 US states. Also, a few spatial data on a global level are also provided. These data can be directly accessed using Add GIS Data tool from the dashboard or from the map tools. Add GIS Data is also made available in certain IGISMap tools to help users access GIS data directly within the tool itself.

In Merge Polygons tool, Add GIS Data option is provided to access polygon GIS data of various administrative level boundaries of each country. Users can add any polygon data from IGISMap collection and merge the required polygon features. In this article we are going to see how this is done.

Click to open the Merge Polygons tool or click Merge Polygons tab from the dashboard.

Add/Upload GIS Data

There are multiple options in Merge Polygons tool to add the input data. In this article, we will select Add GIS Data option to add the required data from IGISMap data collection. For demonstration, we will use the GIS data of local government area boundaries of South Australia. Thus we will select Australia from the Select Country list.

Add/Upload data and merge polygons
Add GIS Data – Select Country

After selecting the country, list of GIS data associated with Australia will open.

Add/Upload data and merge polygons
Add GIS Data – Select Layer

Scroll down or search for local government area in the search bar to filter the list to the required data. Select administrative local government area boundaries data from the list and click Add Layer icon.

Local Government Area Boundaries of Australia
Local Government Area Boundaries of Australia

Add Layer will preview the selected layer in the map and the options to crop the layer will be available in the tool. Since we only want the LGA boundaries of South Australia. Thus click the Crop Layer button and start drawing a polygon completely enclosing the LGA polygon features of South Australia and click Add Layer button.

Crop Layer
Crop Layer

Add Layer button will publish the cropped LGA boundaries of South Australia on the map and the Select Polygon section of the Merge Polygons tool will open.

Data Published From Add GIS Data
Data Published From Add GIS Data

Check this article Merge polygons features online using IGISMap to understand how to upload data and merge polygons in Merge Polygons tool.

If you have Point data then use our feature points to polygon converter. You can directly upload the point GIS data or convert addresses from spreadsheets to points.

Merging Polygons

There are two options to select the required polygon features – Lasso Tool and Select Manually. We will use Select Manually option. After selecting Select Manually, click Select Multiple Polygon button. Now select the polygon features of Roxby Downs, Coober Pady, and Unincorporated SA boundaries, which we want to merge the polygons together. After selecting the polygons, click on the Submit button to start the process of merging the selected polygon features.

Select Polygon - Select Manually
Select Polygon – Select Manually

In a few seconds, a new layer of the input GIS data of LGA boundaries gets published. In this layer, the selected polygon features are merged into a single polygon as shown below.

Add/Upload data and merge polygons
Polygons Merged and Published

Check the article Share your Map to know how to share your map with others using Share Map feature.

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Convert addresses from spreadsheet to points on Map in two steps

Consider a customer service manager working for a supermarket company wants to connect with some of their best customers for giving winning prizes and to promote their business. The manager has a list of contacts along with their address which is located all over America. In order to deliver the winning prizes to their doorstep, he has to find the best route which takes a minimum number of days to receive it. Hence he has to give the delivery partner the best route which is easier and less time-consuming.

In such cases, Geocoding helps to make the process easier. Geocoding is the process of converting one or more valid address with location details into GIS points.Geocoder tool of IGISMap can be used for converting address details to point GIS data in a few steps. You only need to upload the spreadsheet file with address columns and assign the address columns to start plotting. Option to review the plotting and edit the points are also available in this tool.

IGISMap is a GIS-based web platform, that provides multiple GIS applications that are most important in the field of geospatial analytics. The peculiarity of IGISMap in the GIS Industry is its UI/UX, which helps the user to perform effortless geospatial operations. IGISMap allows users to edit the data table of vector data by editing the name of the columns, deleting the columns, and adding new columns. The Geocoder tool on the IGISMap increases efficiency by enabling different companies to better coordinate their sales in both domestic and foreign marketing activities.

Open Geocoder tool using the following link

Upload spreadsheet file

For uploading the input file, click on the Browse option, select the excel/CSV file from your system that you want to visualize on IGISMap, and click on the Upload option.

Geocoder - Upload Excel/CSV file
Upload Excel/CSV file

Match the Columns

After successfully uploading the file, the next step is to assign the address columns in your file to be used for geocoding. There are 2 options to match the columns – Full Address and Other. Full Address option is used for files with address information provided in a single column. In our case, we have address distributed in several columns, thus we will choose Other option. Click Other option and select the right address columns from you file at the right address types such as address, city, zip, state. Then select the country and click Submit button to geocode the address.

Geocoder - Match The Columns
Match The Columns

Review the geocoded locations

A GIS layer gets published after submitting, with point locations based on the address information from the input spreadsheet file. Result section also opens with datatable and Relevance_score column.

Geocoder Result
Geocoder Result

Relevance_score is a value ranging between 0 to 10 provided for every row depicting the accuracy of the plotted locations after the geocoding each address, where 10 being the highest accuracy. User can check the relevance score for each row and edit the point location if needed. Rows of the point features will be highlighted in red color if the relevance score is below 8. This is to notify the user to confirm the location plotted.

Result - Relevance Score
Relevance Score

How to edit location by checking relevance score

The user can delete any feature by using the Delete Feature button present on the Relevance_score table. Click Edit Attribute button of any required feature to start editing the attribute values of that feature and then click Save icon.

The user can edit the location of any point feature by using the Edit Location button. After clicking the Edit Location button in the row of any point feature, a pop-up menu with the options to edit the location.

Edit Location
Edit Location
  1. Search Address – Enter an appropriate address to replace the pin to that location
  2. lat-lng – Enter latitude/longitude values to replace the pin to that coordinate
  3. Current Location – To replace the pin to your current location
  4. Add Point – Manually plot a point on the base map

Now click Submit button to save the changes in the point GIS data

User can further edit the style of the points or share the map publicly or privately

How to style your polygon GIS data categorically

GIS helps users to understand patterns, relationships and geographic context. It benefit includes improved communication and efficiency, as well as improved management and decision-making. GIS combines datasets with maps, integrated regional datasets with any type of descriptive information or data. It provides mapping and assessment prerequisites for technology and almost every industry.

Visualization and intepretaion of data is what makes GIS a beautiful and interesting fields in data analytics. Science of visualization is the core essence in the art of cartography and mapping. Any type of geospatial features presented in the map with proper color combination, accurate size and location helps in better image interpretation. Quantity and category based representation of spatial features are the common visualization styles used in GIS.

IGISMap Styling Tools

IGISMap is a web platform providing multiple GIS applications that are most important in the field of geospatial analytics. The peculiarity of IGISMap in the GIS Industry is its UI/UX that helps the user to perform effortless geospatial operations. IGISMap provides the following styling tools:

Among the styling options listed above – Basic, Category and Quantity styling options are used to style polygon and points, whereas Bubble Style and Icon Style are used to symboloze point GIS data. Basic Style will give any single color for the while GIS layer. Quantity Style is used to visualize the GIS data quantitatively. And Category Style will style your GIS map with separate colors assigned to each category of features

In this article we will talk about Category Style tool of IGISMap and how it can be used to categorically visualize your polygon GIS data like the following.

USA County Boundaries Data Categorized Based On States
USA County Boundaries Data Categorized Based On States

Add your GIS data

For the demonstration, let’s add county boundary polygon data of USA from IGISMap GIS data collection. For this let’s use Add GIS Data tool of IGISMap.

Click to open Upload Vector File tool.

After opening the Add GIS Data tool, in the Select Country section we will select United States of America. Then Search Layer section opens with the list of GIS data of USA, where we need to select ‘administrative county boundaries‘.

Add GIS Data
Add GIS Data

Before adding this data, lets check the data table of this data and verify the attribute field which we need to categorize this data. Switch the view from Map to Datatable and review the attribute fields. Here we are going to categorize the polygon features of county boundaries based on the state which it belongs to.

As you can see below, we have the attribute field for counties and the attribute field with states it belongs to.

Add GIS Data - Datatable
Datatable in Add GIS Data

Since we have confirmed the data, lets continue downloading. First click the download icon beside the data name and then click the Add Layer button in the next section that opens.

Add GIS Data - Add Layer
Add Layer

Now the layer is published in the map with the name ‘united_states_administrative_county_boundaries

Data published
Data published from Add GIS Data

Click here – Download USA County Boundaries GIS Data

Open IGISMap Category Style tool

After adding the input GIS data from Add GIS Data, we can style the counties categorically using Category Style tool. For accessing the tool, click Tools button at the upper left side of screen to open the map tools popup. Then select Category Style tool listed under Style Your Data section.

Map Tools
Map Tools

We can also open the Category Style tool by going to the More option of input point data and choose the Category Style from the Edit Style option.

More options - Category Style
More options -Edit Style – Category Style

Styling GIS data categorically

Then the tool is appeared on the screen of IGISMap.

Category Style
Category Style

Then the tool appears and we have to select the layer from Select Layer section which is the ‘united_states_administrative_county_boundaries‘ data that is published in this map and then we have to click Next option.

Category Style - Select Layer
Select Layer

After clicking Next, in the Edit Layer section, we can change the style as we want. In this section we can can change Opacity and change the Border Width as required. Now in the Attribute field, select state field to categorize the counties based on its individual attributes values.

Category Style - Edit Layer
Edit Layer

After selecting the required attribute field, all individual values will be listed with different colors assigned for each category.

Select Attribute Field
Select Attribute Field

We can change the color for each category by the color and choosing the right color. Then we have to click OK.

Category Style - Assign Color
Assign color to each category

After changing all color of the attributes we have to click on Save Style for styling the map categorically.

Save style
Save the Style

Now as you can see the map is converted into categorical style and the output map is shown.

Polygon GIS data categorized
Polygon GIS data categorized

For better view and make your data more interactive in the map, go to More and enable Make Interactive option.

Make Interactable
Make Interactable

Now as you see below, the USA county level boundaries GIS data is better visualized in state based categories and the map got more interactive.

Interactable Map
Interactable Map

You can share your map with others in public or private mode. Article Share your Map will help you understand more about Share Map feature of IGISMap.

Other articles:
Check the following IGISMap tools:

How to use Add Existing File tool of IGISMap

The applications of GIS tools are expanding in the field of business, research, defense, etc. Thus the features and tools of every GIS software are updating abruptly for helping users in these industries to get the right information by performing complex analyses over GIS data. But working with most of the GIS software in the market requires adequate training and dense knowledge in geospatial concepts.

That is where IGISMap is useful. IGISMap is GIS based web platform providing multiple GIS applications that are most important in the field of geospatial analytics. The peculiarity of IGISMAP in the GIS Industry is its UI/UX that helps the user to perform effortless geospatial operations. In this article, we will discuss Add Existing File tool of IGISMap.

In IGISMap, GIS data is uploaded, created, edited and worked on a map. A map is a spatial interface that supports GIS data and give access to various tools to perform geospatial operations. As a user of IGISMap, you can create any number of maps and add GIS data of any formats.

Add Existing File is a tool that keeps the list of all data that are available on every map in your IGISMap account. Users can open this tool directly from the map or from the dashboard to view the list of data that are published in the maps. You can select any data from the list, preview it and add that data to the map. Thus you dont have to take effort on uploading the data again if it is available in any map.

Let’s look into the application of Add Existing File tool in IGISMap.

Get directed to Add Existing file tool using the following link

Publish GIS data in the map

Let’s see how a data published in a map get listed in Add Existing Tool. So let’s first publish a data in a map. For this lets use Add GIS Data and publish USA county boundaries polygono data

Add data from IGISMap GIS data collection

Select united states of america from the list of countries and select the data administrative county boundaries and click Add Layer icon.

Download USA County Boundaries Shapefile

Add GIS Data
Add GIS Data

In the next step, since we dont need to crop the data, directly click Add Layer button as shown below.

Add GIS Data - Add Layer
Add GIS Data – Add Layer

Now, GIS data of USA county boundaries are successfully added in the map.

Add GIS Data - Data Published
Data Published

Publish data from Add Existing File

Now, we can add the USA County Level data layer using the Add Existing File. If you want add the data in a new map, open Add Existing File tool from the dashboard.

IGISMap Dasboard
IGISMap Dasboard

If you want to add the data from an existing map, click the Tools button below the layer list. This will open the list of all tools of IGISMap, as shown below.

In the section Add Your Data, click Add Existing File to open the tool.

Map Tools
Map Tools

Now Add Existing File tool is opened with the list of all images currently published in the maps of your IGISMap account. The data we added from Add GIS Data, which is administrative county boundaries data of USA is listed top of the list. Or you can search the data using Search Layer option.

You can click and preview the data like the following.

IGISMap Add Existing File tool
Add Existing File tool

Click Add Layer button to publish this layer in your new map.

Data published
Data published from Add Existing File tool

More link:

Download United States of America Administrative Boundary Shapefiles – States, Counties, Reservation Lands and more

Download India Administrative Boundary Shapefiles – States, Districts, Pincodes and more

Namaste GIS professionals after a long time here is the shapefile of India. We get lots of queries on how to download India boundary shapefile for free and now the wait is over. In this post you will find administrative levels as well as electoral divisions of India.

  • All data available are in GCS datum EPSG:4326 WGS84 CRS (Coordinate Reference System).
  • You need to login for downloading the shapefile.

Download Free Shapefile Data of India

India, officially known as the Republic of India is a country in South Asia. It is the seventh-largest country by area, the second-most populous country, and the most populous democracy in the world. Bounded by the Indian Ocean on the south, the Arabian Sea on the southwest, and the Bay of Bengal on the southeast, it shares land borders with Pakistan to the west, China, Nepal, and Bhutan to the north and Bangladesh and Myanmar to the east. In the Indian Ocean, India is in the vicinity of Sri Lanka and the Maldives. Its Andaman and Nicobar Islands share a maritime border with Thailand, Myanmar and Indonesia.

India GIS Data - National Boundary
India National Boundary

Download India National Outline Boundary Shapefile

Download India States Shapefile Data

India is a federal union comprising 28 states and 8 union territories, for a total of 36 entities. The states and union territories are further subdivided into districts and smaller administrative divisions.


  • Arunachal Pradesh
  • Assam
  • Karnataka
  • Manipur
  • Meghalaya
  • Mizoram
  • Nagaland
  • Punjab
  • Rajasthan
  • Sikkim
  • Tripura
  • Uttarakhand
  • Telangana
  • Bihar
  • Kerala
  • Madhya Pradesh
  • Gujarat
  • Odisha
  • Chhattisgarh
  • Goa
  • Haryana
  • Himachal Pradesh
  • Jharkhand
  • Tamil Nadu
  • Uttar Pradesh
  • West Bengal
  • Andhra Pradesh
  • Maharashtra

Union Territories:

  • Chandigarh
  • Andaman and Nicobar Islands
  • Lakshadweep
  • Jammu and Kashmir
  • NCT of Delhi
  • Puducherry
  • Dadra and Nagar Haveli and Daman and Diu
India GIS Data - State Boundaries
India State Boundaries

Download India State Boundaries Shapefile

Download India Districts Shapefile Data

States and the Union Territories are divided into districts. At the time of Census 2001 there were in all 593 districts against 467 districts at the time of 1991 Census. Each district is further divided in to sub-districts, which are known differently in different parts in the country (e.g., tahsil, taluka, community development (CD) block, Police station, Mandal, revenue circle, etc.).

India GIS Data - District Boundaries
India District Boundaries

Download India District Boundaries Shapefile

Download India Pincode Boundaries Shapefile Data

There is more than 1,55,000 post offices based on Department of Posts (DoP) website. The following GIS data provided by IGISMAP contains 19929 postcode area polygon boundaries,

India GIS Data - Pincode Boundaries
India Pincode Boundaries

Download India Pincode Boundaries Shapefile

Other Administrative Boundary Data:

India Demographic Data:

Download free Shapefile

Disclaimer : If you find any shapefile data of country provided is in correct do contact us or comment below, so that we will correct the same in our system as well we will try to correct the same in OSM.