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Nowadays engineers and scientists rely heavily on data and the story it tells. Regardless of the domain of study or data size, whether it is a collection of astronomical observations, or the results of subtle numerical simulations, or material properties tests, the insights that data represents have to be found and represented in a form that allows to build further predictions and models.

All modern analytical software packages and applications work with common digital data formats, like spreadsheets (xls, xlsx, odf, odt, other), and text data (txt, csv, other). However, not all data that researchers can access is represented in these digital formats. Many times, researchers encounter image plots that need to be digitized for further analysis. This is where tools like plotdigitizer come into play, offering an efficient solution for converting visual data into usable formats.

In this brief article, you will get a picture of how to digitize graphical data with our free online plot digitizer.

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The process of digitizing plots involves converting visually represented data into a structured, numerical format. SplineCloud achieves this by allowing users to define a digital coordinate system and data points on top of the image. With the plot digitizer download option digitized data can be saved in CSV file. An alternative approach is to use SplineCloud API to access dataset in code.

SplineCloud allows to digitize several plots on the same image by creating new datasets and map several data ranges on the same plot by creating new subsets. Digitized data can then be shared with others and used to find models that fit the relation it represents with the help of the integrated curve fitting tool.

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Several online and desktop tools for digitizing plots are out there, however, SplineCloud provides a range of important features that ensure you get the job done quickly. As a plot digitizer free online solution, it also makes reusing data for further analysis easy, without any extra hassle.

1. Web-based
   No need to install anything on your system – use our plot digitizer online free tool with your desktop browser (no mobile support is available as of now).

2. Simplicity
   We provide an intuitive 3-step workflow to digitize a plot: pick axes -> set scale -> pick data points.

3. Accuracy
   Our plot digitizer software provides the ability to scale deep into the plot to achieve better positioning of axes and data points.

4. Data Preservation
   Once digitized, your data remains in the cloud and can be reused later and shared with others.

5. Accessibility
   Digitized datasets and subsets get their IDs and can be accessed over SplineCloud API or downloaded in a csv format.

6. Seamless Curve Fitting
   Once data is extracted from an image, you can find the best fit for it directly on SplineCloud without the need to use side services and tools.

With SplineCloud, you can experience the convenience of using web plot digitizer online free for accurate and hassle-free data extraction.

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For those wondering how to use plot digitizer tool effectively, SplineCloud offers a straightforward and versatile solution. Its features make it easy to work with data from multiple plots and ranges. Let me guide you through the workflow - it is very simple and consists of three main steps:

Step 1

Create a public repository on SplineCloud and upload your plot. SplineCloud supports "jpg", "jpeg", "png", "bmp" and "webp" formats. Your image can contain one or several plots.

Step 2

Click the “Define CS” button to set up the coordinate system. Place CS origin to the plot origin. You can scroll in and out to adjust the scale and achieve higher positioning accuracy. Use a square handle to drag the CS origin if needed.

After placing the origin, adjust the positions of the bounding handles across the X and Y axes and set corresponding values to the input fields. Click “Done”.

Step 3

Now, when the digital coordinate system is mapped to the image plot, you can proceed with picking data points on the widget with a double click. Scroll in and out to adjust the plot scale. You can also drag points to achieve higher positioning accuracy.

After you pick all data points reset the scale with a control button on the top right of the widget. You can add new subsets if your plot contains several ranges of data or several curves. If your image contains several plots click the “New Dataset” button on the top right of the page and repeat the procedure for another plot. With the plot digitizer web, you can easily handle multiple datasets and manage complex plots directly online.

Click the “Fit Curve” button to proceed to the curve fitting.

The ability to reuse extracted data in external applications is another strong advantage of the SplineCloud approach. Use the "API link" buttons to get the references to datasets and subsets and pull them in your code with the help of SplineCloud API.

For those seeking a web plot digitizer free solution, SplineCloud offers an efficient and reliable tool to simplify the process. Additionally, users can download plot digitizer data directly, making it easy to save structured datasets for offline use or further analysis.

Excited to give it a try? Sign up for free now and have fun with our best plot digitizer!