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Introduction to DNS Types

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Top 3 Types of DNS

There are three DNS types :

1. DNS queries

Three types of queries occurs in DNS query:

Recursive Query: Recursive query is a type of query in which the DNS server will do all the job of answering the users. In recursive query DNS server querying to the other DNS server on behalf of the user. When the user requesting by asking name to the server, the server performs complete translation and the user directly gets the IP address of the domain.

Iterative Query: In an iterative query, the user can request repeatedly to the different DNS servers for resolution. It means iterative DNS query is a request for a website or URL, DNS server responds with the IP address, if the server does not have the requested IP address then request forwarded to other DNS server.

Non-Recursive Query: The non-recursive query is a query in which the DNS Resolver already knows the answer. That either immediately returns the DNS records or queries the name server which is authoritative for the records, because that stored in local cache, immediate response to be given to the user.

2. DNS Servers

DNS servers convert domain names into IP addresses. It takes request from human and converts that into machine IP addresses that make easier to reach the origin server.

DNS Root Server: Root servers are the DNS name servers that are operated in the root zone, root zone is the stored record of queries so that server can directly answer the query from the root zone or cache within the root zone. The DNS uses 13 DNS servers and that is based on a constraint of Internet Protocol version 4.

Authoritative Name Server: The authoritative name server is the higher level in DNS. The DNS server is the ‘authoritative’, the authoritative name is given to the specific hostname because it holds the up-to-date information about that hostname.

3. DNS Records

The common DNS record types are –

Address mapping record (A record): Address mapping record is known as ‘A record’, it is a host of DNS record which stores a hostname and its corresponding IP address, it means that to provide the IP address associated with the domain name. It is a type of DNS record .

IP version 6 address record (AAAA record): Internet Protocol version 6 record is the second type of DNS record and is also called as ‘AAAA record’. The ‘AAAA record’ stores the information of hostname and IP address related to version 6.

Canonical Name Record (CNAME record): The Canonical name record is shortened as ‘CNAME’. The ‘CNAME’ maps one domain name to other, for example, the ‘CNAME’ record can map the web address which is taken to the actual website.

Mail Exchanger Record (MX Record): Mail exchange record is called an MX record. It represents the mail server that is responsible for accepting email messages on behalf of the domain name, all the emails sent to the recipients first will be sent to the mail server with the IP address and then the recipient gets that email.

Name Server Record (NS Record): The name server record is shortened as an ‘NS Record’. It specifies the domain name of the name server. This record is present at the top of your domain, these are public and these types of records are store only at specific locations.

Reverse-lookup pointer record (PTR Record): A reverse-lookup pointer record is also known as a PTR record. It provides a domain name that is associated with an IP address. It is opposite to the ‘A record’. The PTR record is used in the lookup of DNS.

Certificate Record (CERT Record): The certificate record is shortened as ‘CERT Record’. It stores the encrypted certificates and provides information to the authentic recipients only.

Service Location (SRV Record): The service location records store the data about location (i.e. hostname, port number) in the domain name server. It is a DNS resource record that is used to locate domain controllers for the active directory.

Text Record (TXT record): A text record is the type of DNS record that contains text information for sources outside of the domain, also carries machine-readable data such as encryption, sender policy, etc.

Start of Authority (SOA Record): The start of authority record is a type of DNS record that contains information about DNS zone files, domain serial number, and especially regarding zone transfer, its format is specified in RFC 1035.


In this article, we conclude that the DNS types play an important role in a computer network; it is beneficial for anyone who is using the computer. The hostname is for human use and the IP address is for the machine attached in the network, DNS converting numeric IP addresses to hostname and back.

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Types Of Seam With Fullness

The additional fabric used to cover the drape’s width and occasionally its height is known as “fullness.” A drape with more fullness has a richer appearance. It offers additional light and sound absorption as well as an increase in the depth of field that may be seen. How much fullness to add to a drape depends on its usage, style, and price range. If seams need to be “hidden” within the pleat, there is another thing to think about. The meaning of “fullness” is that it helps achieve proper fit and comfort and is done to create variation. Fullness is released by pleats, tucks, and gathers; darts are used to create flat patterns; and fullness gives clothing more adornment.

Types of Seam with Fullness

Following are the major terminologies used as types


Pleats are folds in clothing made at equal intervals on the yoke, sleeves, and waistband of skirts to release fullness. Pleats are made at the top and smoothly flow down the bottom of the fabric. A final pleat’s size is three times as large as the material needed to create it. They usually range in size from 2.5 to 5 cm. They can be employed as a style detail and cause eye movement.

Depending on the fabric chosen, a pleat has a different effect. The depth of the pleat is determined by the fabric’s weight and the desired look. Knife, Box, Inverted, Accordion, Sun Ray, Pinch, and Kick pleats are a few examples of the various pleat styles.

Ruffles and Frills

A ruffle is a fabric strip that has been trimmed or handled in a way that creates fullness. These are employed in order to embellish clothing. They can occasionally be used to lengthen the hems of skirts and dresses.

To create flare and add ornamentation, frills can be gathered or pleated and cut on a straight, bias, or circular axis. It is crucial to leave enough fullness for gathering, but how much should be left depends on the fabric type. They can be used to trim the neckline, wrists, and hem of a garment either individually or in tiers. Ruffles and frills are best made from light-weight, sheer fabrics.


A dart is a triangular fold that is crucial when manufacturing clothes. It contours a flat piece of cloth to fit the natural curves of the body’s bust, armholes, neckline, and waist. They are primarily used in clothing for women. They are essential when designing clothing and cannot be disregarded. In the process of making darts, the stitching should begin at the broad edge and travel toward the tip. Normally, darts are made before a garment is sewn. It aids in improving the fit of the clothing. Single-pointed darts and double-pointed darts are the two different varieties of darts.


A tuck is a fold in the cloth that is sewn down to give the garment more fullness. They should have an even width and aid in shaping a garment. Depending on whether the garment is used for ornamental or functional purposes, tucks can be done on either the right or wrong side of the garment. They produce a decorative accent that gives clothing more fullness. They appear more alluring when wearing exquisite and delicate fabrics. They ought to be separated equally. The various tuck styles include the pin, cross, piped, and shell tucks.


Gathers are used to distribute fullness evenly in a specific area. Depending on the desired impact, the material requirement can be adjusted to be twice as wide. Cotton that is stiff has a crisp look, whereas silk or any man-made fibre has a graceful one. Elastic, a machine, or a hand can be used to gather material. Using the sewing technique of “gathering,” a fabric strip can be made shorter so that it can be joined to a shorter piece. It is frequently used to manage fullness in clothes, such as when a full sleeve is attached to a shirt’s armscye or cuff or when a skirt is fastened to a body.


A godet is an additional piece of cloth sewn onto a garment, typically a dress or skirt, in the shape of a circular sector. When a godet is added, the item of clothing in question flares, adding width and volume. A godet gives a piece of clothing added range of motion for the wearer.


According to current fashion trends, flares can be added to skirts, sleeves, trouser legs, and other garments. To add diversity, you can change the degree of flare. For instance, an A-line skirt has the least amount of flare at the hem, while a circle skirt has the most. Bell sleeves have a modest flair, whereas circular sleeves have the most flare.

Shirring Gores

To create a fitted bodice or hip and a flared-out hem, gores can be added to a skirt, kameez, or top. The type and availability of the fabric, the grain, and the desired level of fullness for the hemline all affect how many gores are inserted. It can be anywhere from 4 and 12; either 6 in the front and 6 in the rear, or 2 in the front and 2 in the back. In order for gored skirts or dresses to drape properly, the grain line is crucial. In order to achieve a decent, uniformly distributed flare and an appropriate slant on the seams, the centre of the gore should be on the straight grain.


To sum up, fullness makes a cloth look appealing and helps it accommodate the body’s natural curves. The contour is shaped by darts. Any area of the garment can be made fuller by pleating, gathering, or tucking. The type of material determines the choice of fullness.

Explanation, And Methods With Different Outputs

Introduction to Kafka Event

In Kafka, the Kafka events would be some sort of an action (read or write) that can perform on the Kafka partition when any action or task was executed. The action will be from the internal Kafka environment or from the external world. As per the requirement, we can choose any implement strategies for the Kafka events. The Kafka event majorly distributed into three major strategies like

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Single Topic



As per the requirement, we can select the above strategies. But before selecting it, we need to consider multiple factors like the data size, access request, and topic classification (it would be the single topic or separate topic for the Kafka events).


As such, there is no specific syntax available for the Kafka Event. Generally, we are using the Kafka Event value while creating new events or defining the new event strategies on the number of Kafka topics.


1) While working with the Kafka Event. We are using the core Kafka commands and Kafka Event command for the troubleshooting front.

2) At the time of Kafka Event configuration; we are using the CLI method. But generally, we can the Kafka logs as well for further troubleshooting.

How Kafka Event Works?

The Kafka Event is useful when any specific task or activity may occur and with respect to this activity, we need to execute the Kafka event. To manage this, we are having multiple ways to handle this event like

Single Topic: It will store all the events with respect to all the entities in a single Kafka topic. In the same single topic, we can define multiple partitions.

Topic per entity category: We can select a different topic for all the users associated with the events and all the entity related events.

Topic per entity: We can select a separate topic for a single user and a single entity.

Sr No Configuration Parameter Prominence Description Default Value of the  Configuration

1 application.server Low We need to define the combination of the hostname and the port of the server. It is pointing to the embedded user that would be defined in the endpoint. It would help for discovering the locations of state stores of the single or multiple Kafka streams job or application. The configuration value may vary from the different Kafka architecture and server configuration. the empty string

2 buffered.records.per.partition Low This configuration property will help the maximum number of records to the buffer per Kafka Events. 1000

3 cache.max.bytes.buffering Medium 10485760 bytes

4 Medium The client id will be in the string format. While doing a request, it will help to pass to the server. The same configuration will pass to the consumer/producer clients in the Kafka streaming application. the empty string

5 Low As per the configuration value, the frequency in which to save the position of Kafka events. 30000 milliseconds

6 default.deserialization.exception.handler Medium This configuration value details with the exception handling class that implements the Deserialization ExceptionHandler interface. LogAndContinueExceptionHandler

7 default.production.exception.handler Medium This configuration value details with the exception handling class that implements in the Production Exception Handler interface. DefaultProductionExceptionHandler

8 key.serde Medium It will be the default deserializer and serialize class for record keys. It will implement the serde interface. The same value will be inherited from the key.serde configuration property. serdes.ByteArray().getClass().getName()

9 metric.reporters Low This configuration property helps to list out the classes to use the metrics reporters. the empty list

10 metrics.num.samples Low This configuration property helps to the number of samples to maintain the compute metrics. 2

11 metrics.recording.level Low This configuration property helps to the highest recording level for metrics. Info

12 Low This configuration property helps to the window of time a metrics sample (in computed over). 30000 milliseconds

13 num.standby.replicas Medium It will help to define the number of standby replicas for each application or job. 0

14 Medium 1

15 partition.grouper Low This configuration property helps to the partition the grouper class that helps to implement the Partition Grouper interface. See Partition Grouper

16 processing.guarantee Low This configuration property helps for the processing mode. It is having two different values like “at_least_once” (it will be the default) or the “exactly_once” value. See Processing Guarantee

17 Low This configuration property helps to define the amount of time in milliseconds. To block the waiting for input. 100 milliseconds

18 replication.factor High It will help to define the replication factor for change log topics. The repartition topics were created by the application. 1

19 retries Medium It will be the value or the number of retries for broker requests. It will lead the return to the retryable error. 0

20 Medium This configuration property helps to define the amount of time in milliseconds, before any request was retried. It will apply when the retries parameter was configured. But the value should be garter than zero. 100


Low This configuration property helps to define the amount of time in milliseconds. When the partition has migrated then it will wait before deleting state. 600000 milliseconds

22 state.dir High The chúng tôi property will define the directory location for state stores. /tmp/kafka-streams

23 timestamp.extractor Medium We can define the timestamp extractor class; it will help to implement the Timestamp Extractor interface. See Timestamp Extractor

Examples to Implement or Check Kafka Event

Create a Topic to Store the Events

In the Kafka environment, we can store the events.

Command :

Consume the Kafka Events:

Explanation :

As per the below screenshot, we have created “Kafka_events” topic and consume the events on the same topics.

Output :


We have seen the uncut concept of “Kafka Event” with the proper example, explanation, and methods with different outputs. As per the requirement, we can choose the Kafka strategies for the Kafka event handling like Single Topic, topic-per-entity-type, and topic-per-entity. If we want to execute and task, as per the previous event was happed in Kafka. In such cases, we are using Kafka events.

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Top 3 Reasons Why Small

Today, the smartphone industry is in the 6-inch era. You can barely find new smartphones with less than a 6-inch display. To this end, many people wonder why small-screen smartphones are losing popularity. Whether we are considering manufacturers or the eventual users, small-screen smartphones are losing popularity. There are three main reasons why small-screen devices are not so appreciated anymore.

Small-Screen Smartphones – no longer a “perfect golden size”

1. Does not meet market needs

The market today is very different from the smartphone market of ten years ago. In the past, no one really cared about the features of a smartphone. Just produce a beautiful and working smartphone and that is enough. However, this is not the case anymore. When a brand release a smartphone now, users will commence comparison of the processor, storage capacity, camera, screen, battery and other aspects.

It doesn’t matter how good the device is practically, if the specs are poor on paper, it may affect the sales of the smartphone. In terms of screen size, there is a trend and the display is getting bigger and bigger. From 6 inches to 6.5 inches to 6.8 inches and even to 8 inches foldable screens. Smartphone users now have more usage scenarios for their devices thus the small-screen no longer works. Smartphones are now used for browsing web pages, gaming, online classes/meetings and so on. Thus, a 4-inch display will certainly not meet the need of users. 

On the one hand, consumers’ demand for large-screen mobile phones is increasing day by day. Thus, the manufacturers have no choice but to give users what they want. Furthermore, from the manufacturer’s perspective, the development of small-screen mobile phones is actually challenging. This is because many of those that what small-screen smartphones also need big batteries and perfect heat dissipation. This is a very complex process for manufacturers to achieve. Thus, the manufacturers just prefer to cater to the market and develop more popular large-screen mobile phones.

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2. Small size means a lack of space for good features

Even though some users want small-screen smartphones, they also want the latest technologies. Many of these technologies require a lot of space. Take for instance a periscope telephoto camera, it can consume over 25% of the rear of a 6-inch smartphone. Putting this in a 4-inch smartphone means that there is absolutely no space for battery, speakers and other components.

However, the result of the small size of the mobile phone is that there is not much left to “squeeze” the internal space of the mobile phone. The dense internal layout will eventually lead to the problem of heat dissipation issues of the phone. The performance of the smartphone will significantly reduce because there is not enough space for heat dissipation. This will also castrate the overall features of the device. 

In addition, small-screen smartphones such as iPhone 12 mini/13 mini/SE 3 have also cut the dual-SIM dual-standby setting. This also limits the purchase of many dual-SIM users. Thus, we have a situation of “you can not eat your cake and have it”. While small-screen smartphones are portable to hold, there is a limit to their performance. 

3. Weak market performance

This third reason is basically on the part of the manufacturer. When a product is not performing well, a manufacturer will have no choice but to cut the product. Taking the iPhone for example, the small screen iPhone 12 mini and iPhone 13 mini had the poorest sales in both series. Apple had to take action in response to the poor sales performance of the iPhone 13 mini by eliminating the iPhone 14 mini model. Thus, all the models in the iPhone 14 series will use 6-inch+ displays. 

In the future, the accessories of these small-screen mobile phone products that are visible to the naked eye will also be reduced or discontinued. If you start with this kind of small-screen mobile phone now, for example, the key screen, battery and other parts will likely only be replaced by official stock accessories or third-party accessories in the future.

Presently, the small-screen smartphone in the market has between 6.0-inch to 6.3-inch displays. As for the large screens, they have between 6.7-inch to 6.9-inch displays. The 6.7-inch to 6.9-inch displays used to be for Max series which are closer to tablets. However, some brands like Xiaomi have since discontinued their Max series.


It is undeniable that small-screen mobile phones are very popular with users who can operate with one hand. Nowadays, manufacturers that can insist on producing small-screen mobile phones also launch related products from users’ perspectives. However, as the sales of small-screen mobile phones continue to decline, small-screen mobile phones are bound to withdraw from the historical stage of mobile phones.

As of now, smartphones with small displays struggle to sell in the market. Users are bound to complain either about battery issues or heat dissipation issues. This is because of the lack of space that these devices possess. Thus, it is becoming pertinent for manufacturers to completely abandon the small-screen smartphones and focus on larger displays. This is what the market appears to appreciate.

Different Types Of Economic Utility

Definition of Economic Utility

Economic Utility is the total satisfaction a consumer derives from consuming a product. In other words, it is the satisfying power of any good or commodity. For example, Mr. Vivek can go to his workplace by cycling or by car. He prefers cycling as he derives greater utility (both health-wise and cost-saving) from it.

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In the above example, the utility is not measured in numbers. When numbers come in to measure utility, we mostly use them to compare products.

Therefore economic utility is totally psychology. The utility of a given product may be different for every person based on the demands of the person.

A consumer/buyer usually purchases a particular product when he will derive some benefit/benefit by using the product. He believes that the use or consumption of the purchased goodwill fulfills his want. Utility depends on consumer demand. A consumer’s demand/want will be fulfilled on the basis of the amount of utility fulfilled by the product.

Types of Economic Utility

An economic utility can be broadly divided into four main types:





We will now discuss each form of utility in detail:-

1. Form

A utility is created by changing its form. Form utility is the value that the customer sees in the finished product. Every company tries to increase its form utility as the finished product is more useful to the consumer than the raw materials used to make it.

Companies always try to understand and analyze the target market segment. This will help the company to figure out what kind of product they should make.

For example

A company may use wood to make finished products like cabinets which will add significant value for the customers and thus increase the form utility.

Wood logs converted to furniture.

Wood pulp is used to make finished products like paper which add significant value to the customer in everyday life.

2. Place

The physical location for the availability of the product increases the attractiveness of the good to the consumers. So the place utility has more to do with the physical location of the product’s availability and the distribution channels.

For examples

If goods are sold in stores close to the buyer’s home or office, it will be convenient and efficient for the buyer.

Goods in store increase the utility of place.

3. Time

The availability of products and services when the customer needs them. The customer wants a good or service depending on the season and the weather conditions.

For examples

During the rainy seasons, umbrellas are very important, and their demand also increases. During the winter, the demand for warm clothes increases. Time utility increases when the product is easily available when the customer needs it.

Companies are increasing the time utility even more with e-commerce’s coming up with one-day or same-day delivery services. In this way, time utility increases as the customer gets a product when he needs it the most.

4. Possession

If a product is useful for multiple purposes, the possession utility of the product increases. Like when we buy a product for one use but use it for multiple purposes.

For example

we can use a vase for keeping flowers, as an item for decoration, or to keep cutleries.

Vase is used to keep cutleries or flowers.

Can we measure Economic Utility?

Consumers buy a product for different kinds of reasons. The price a buyer is ready to pay is the worth of the product. No buyer will be ready to pay more than the derived utility from the product.

For example

If I buy a television for ₹ 25,000, I derive a utility equivalent to the value of ₹ 25,000. Similarly, if I buy furniture for ₹ 5,000, I will derive utility equivalent to the amount I pay.

But many economists have not agreed with the above statement by Prof Marshall because the utility is different for different people, and it is completely personal and psychological.

A brand of a television set might fulfill my demand, but the same brand X might not satisfy the need of another person.


Therefore economic utility is the total satisfaction or usefulness a consumer derives by consuming the good. In other words, economic utility is how the consumer perceives a given product to fulfill its demand. As discussed, there are four different types of utility: Form, Place, Time, and Possession.

Form utility is the value a consumer sees in the final product. Place utility makes a good or service more easily available to the target customers. Time utility provides easy availability of a good or service when customers need or want it. And lastly, possession utility describes the benefits available to the customers from owning the product.

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5 Different Types Of Raster

Introduction to Raster Data

Raster Data is the type of geospatial data that is used to geocode maps and fill in the information related to surface features. It can be a pixel, matrix or even collection of cell forming a picture in general term. The Satellite imagery and the layers are classified into Raster Data. Unlike Vector Data, this form of data represents the interior part of the feature. Vector Data forms the boundary of any geo feature, and Raster Data fills the feature with specific pixelation. Raster Data are more into storing temperature, elevation, depth and soil pH value related data. The colour contrast varies from. Location to location and also depends on various geographical features covering the area. Two types of Raster data are Discrete Raster Data and Continuous Raster Data.

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How does Raster Data Work?

As given in the above definition, each cell or the matrix act as a data container. They can be called the variables that store colour-specific information depending on the classification and nature of the geographic feature. In the Raster form of data, the map area is divided into several cells and a matrix. The area is equally distributed with the help of Rows and Columns. Each cell of the row and the column has some unique attributes that define the value.

Most of the raster data pixels are in a square or rectangular format, but other shapes like triangular or hexagonal are also possible. The whole imagery or datasheet contains all these uniquely filled cells and forms the Raster data. Raster spatial data structures are two-dimensional arrays; this means that the area that each cell grid represents can both be used to define map resolution and the number of cell grids to describe the spatial distribution. Single-pixel or a cell in the layer can only have one attribute being mapped to it. To handle more than one attribute, more data layers need to be created. These layers can be visualized as stacked, one on top of the other.

While working on any project, GIS Analysts and Technicians load the Raster data models from the serving source and then work on the geocoding and referencing part. Based on the Raster data’s reference, they further create the vector map objects that consist of point, line, and polygon. The data is stored in various file formats like Images (.IMG, .JPG, and . PNG file extensions), ESRI uses bit maps (.BMP, .BPW) and many more customized formats.

The Raster Data is the imagery form of the surface area where each pixel in the data describes the surface area.Camera Sensors are used to capture the features with the help of electromagnetic waves generated through the sensors. The data collected from these sensors are the measurements that are reflected using electromagnetic waves.

There are primarily two types of sensors, Active Sensors and Passive Sensors.Passive Sensorsin the satellite sensors that detect only the data emitted from the landscape or reflected from any other light source. Active Sensors emits their signal, and the sensors in the satellite measures what is reflected. SONAR and RADAR are perfect examples of this type of sensor.

Passive Sensor Active Sensor

Types of Raster Data

Raster Data is further classified into various types; they are:

Satellite Imagery

Digital Elevation Model(DEM)

Digital Orthophotos

Binary Scanned Files

Graphic Files

Let us study the above-mentioned types in details:

1. Satellite Imagery

The imagery is remotely sensed and collected data in the raster format. The image value in the pixel represents the light or energy that is emitted and reflected from the earth back to the satellite sensors, which collects the data. Various types of land use and hydrography features can be classified during image processing. The imagery generated through this method can be either in RGB format or in traditional black & white format.

 2. Digital Elevation Model (DEM)

DEM of Snow covered mountains

3. Digital Orthophotos

Digital Orthophoto is a type of aerial imagery or satellite imagery that is extracted using remote sensing techniques. It is said to the corrected and processed imagery where the camera tilts and terrain relief is removed. This imagery form is geometrically correct and used for the digitization of 2D models. The collection of these Orthophotos form a large sheet of imagery, also known as Google Earth imagery is the perfect example of this orthophoto.

4. Binary Scanned Files

Binary Images Showing the presence in black, grey and white

5. Graphic Files

In this format, the Maps, Photographs and Images can be stored as digital graphic files. The popular graphic files that we come across in our daily life are GIF (Graphic Interchange Format), TIFF (Tagged Image File Format), JPEG (Joint Photographic Experts Group) and PNG (Portable Network Graphics)

Advantages of Raster Data

Raster Datais the simplest form of data structures, and hence they are easy to use and understand by the Geographic Information Systems Workforce.

This data form can be used to do various spatial analysis.

The model maintains uniformity when it comes to size and shape due to matrix and multi-array like structure.

Comparatively to its vector counterpart, the technology is far cheaper and affordable.

This makes the data livelier and presentable due to the involvement of colour codes, and hence when pairing with vector models, it gives proper relatable information.


With the help of Raster data form, spatial data becomes valuable. Most of the organization that is into GIS domain refer to external raster data forms. Raster data is simple yet heavy to handle due to toa large amount of imagery related files. Unlike earlier days, RDMS and Systems have become robust to handle these large and heavy data models. Both the data types are crucial in the world of GIS, but Raster data is the most preferred one.

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