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 https://map.igismap.com/merge-polygon 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 https://map.igismap.com/add-gis 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 https://map.igismap.com/merge-polygon 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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Check the following IGISMap tools:

Upload and view rendered raster images in IGISMap

Raster data in GIS are pixelated data format or images that are georeferenced. Here each pixel represent a geographic area storing the values of any parameter associated with that area. Parameters represented by raster images are mostly continuous in geography such as precipitation, elevation, temperature, vegetation indices etc. Raster images also represents categorical features such as land use land cover.

The conversion of an object’s geometry, color, texture, lighting, and other attributes into a display image is called the rendering of an image. It is the technique of creating a photorealistic or non-photorealistic image from a 2D or 3D model using a computer program. A geospatial raster is only different from a digital photo in that it is accompanied by spatial information that connects the data to a particular location. A raster image can be visualized in different styles such as categorical, quantitative, paletted, multiband etc. These visualization can be stored and saved, so that to be used in other platforms for image interpretations for remote sensing analysis.

IGISMap Upload Raster File tool can add the rendered raster image in GeoTIFF format. 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.

Click https://map.igismap.com/upload-raster to open Upload Raster File tool

Let’s see how this can be done.

Uploading the Rendered Raster Image

After opening Upload Raster File tool, Browse your system folder and select the rendered raster file. Then click on the Upload option.

Uploading the Rendered Raster image
Uploading the Rendered Raster image

About the rendered raster data

As we said in the introduction, the conversion of an image’s geometry, color, texture, lighting, and other attributes into a display image is called the rendering of an image. When it comes to GIS raster images, the alteration in geometry and style of visualization depends on pixel values.

The image that we have uploaded here is a stacked image of Landsat bands – Green, Red, and Near Infrared. And this stacked image is rendered into the style of False Color Composite, which we have uploaded here.

Raster image visualized

After successfully uploading, the rendered raster image is published on the map, which can be further analyzed through image interpretations.

Viewing of Rendered Raster image
Viewing of the Rendered Raster image

Sharing Map

Share Map will also work with map conatining raster image uploaded. For this, first click Share Map button at the map.

Share Map
Share Map

The Map Operation menu will open up to enter and enable the details for the shared map. Click Next button after completing the settings.

Map Operation
Map Operation

Now two options will appear – Share Map and Embed Map. Here we will simply share the map without any security. So click Share Map and click Public.

Share map Publicly
Share map Publicly

Then select Share Map button to open the popup containing a link. Copy this link and share with anyone whom you want to share your map with raster data.

Share Map Link
Share Map Link

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 https://map.igismap.com/geocoder

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 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 https://map.igismap.com/your-data

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