update readme.md

README.md

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-<div style="text-align: center;">
-  <img src="https://huggingface.co/spaces/AgricultureLab2024/GEE_Calculator/resolve/main/logo-color.png"  style="width: 30%; margin-right: 50%;">
-  <img src="https://huggingface.co/spaces/AgricultureLab2024/GEE_Calculator/resolve/main/agriculture_lab-high-resolution-logo-grayscale-transparent.png"  style="width: 30%; margin-right: 50%;">
-  
+<div align="center">
+  <img src="https://huggingface.co/spaces/AgricultureLab2024/GEE_Calculator/resolve/main/agriculture_lab-high-resolution-logo-grayscale-transparent.png" style="width: 30%;">
 </div>
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-**Space : GEE Calculator**
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-1. Sentinel Dataset Selection:
-The app starts by presenting a title and then prompts the user to select a dataset category from a list. These categories are fetched dynamically from the data dictionary. After selecting a category, the user is presented with a second dropdown to choose a specific dataset ID within that category. Once the user makes a selection, the app displays the full path of the selected category and dataset, showing the specific dataset ID.
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-2. Earth Engine Index Calculator:
-After the dataset selection, the app transitions to a section dedicated to calculating Earth Engine indices. Users can choose from predefined indices such as NDVI, NDWI, or Average NO₂, or enter a custom formula for calculation. When a predefined index is selected, the corresponding formula is displayed to guide the user. NDVI and NDWI formulas involve specific band calculations from Sentinel imagery, and the Average NO₂ index is based on the NO₂ band.
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-If the user selects the "Custom Formula" option, they are prompted to enter a formula in a text input field, where they can define their own band-based formula for calculations. If the custom formula field is left empty, a warning is displayed, prompting the user to enter a valid formula.
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-The app is designed to help users easily interact with Sentinel data and perform essential remote sensing calculations without needing to write complex code, making it accessible to a wide range of users from researchers to environmental analysts.