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[Utility & Helpers](/categories/utility) 4. / 5. soandso/continental-index ActiveLibrary[Utility & Helpers](/categories/utility) soandso/continental-index ========================= Library for calculating the index of continentality - a numerical characteristic of continental climate 0.3.1(4y ago)011GPL-2.0-or-laterPHPPHP ^7.4 Since Mar 12Pushed 4y ago1 watchersCompare [ Source](https://github.com/soandsoSwEn/continental-index)[ Packagist](https://packagist.org/packages/soandso/continental-index)[ RSS](/packages/soandso-continental-index/feed)WikiDiscussions main Synced today READMEChangelog (6)Dependencies (5)Versions (8)Used By (0) [![License](https://camo.githubusercontent.com/6c0f7944f5f1ed07c6afc14e6a10d4c866d9eb53c1abc65f3afdba1775716f7d/687474703a2f2f706f7365722e707567782e6f72672f736f616e64736f2f636f6e74696e656e74616c2d696e6465782f6c6963656e7365)](https://packagist.org/packages/soandso/continental-index)[![Version](https://camo.githubusercontent.com/f4ffa23ded1c1dcbdafe3beaad0ac08391feba6a310ee49547d1715ef35bc628/687474703a2f2f706f7365722e707567782e6f72672f736f616e64736f2f636f6e74696e656e74616c2d696e6465782f76657273696f6e)](https://packagist.org/packages/soandso/continental-index)[![Codacy grade](https://camo.githubusercontent.com/f01cdce20467f489ee51a1dbcfff7efa3828be52557cb3167abcdc906a3f1a00/68747470733a2f2f696d672e736869656c64732e696f2f636f646163792f67726164652f6565383831366265383737633439643961663932646331353331643936386533)](https://camo.githubusercontent.com/f01cdce20467f489ee51a1dbcfff7efa3828be52557cb3167abcdc906a3f1a00/68747470733a2f2f696d672e736869656c64732e696f2f636f646163792f67726164652f6565383831366265383737633439643961663932646331353331643936386533)[![PHP Version Require](https://camo.githubusercontent.com/b77a9e8cb1000ebb8ef63852135480bbf901e7119eab89c51b3ce85a8abadf28/687474703a2f2f706f7365722e707567782e6f72672f736f616e64736f2f636f6e74696e656e74616c2d696e6465782f726571756972652f706870)](https://packagist.org/packages/soandso/continental-index)[![GitHub top language](https://camo.githubusercontent.com/79a6a270bb0b3db4d93d79ed2bf4d4448494f997776d6d03857b4fadd4aea2c8/68747470733a2f2f696d672e736869656c64732e696f2f6769746875622f6c616e6775616765732f746f702f736f616e64736f5377456e2f636f6e74696e656e74616c2d696e646578)](https://camo.githubusercontent.com/79a6a270bb0b3db4d93d79ed2bf4d4448494f997776d6d03857b4fadd4aea2c8/68747470733a2f2f696d672e736869656c64732e696f2f6769746875622f6c616e6775616765732f746f702f736f616e64736f5377456e2f636f6e74696e656e74616c2d696e646578)[![GitHub code size in bytes](https://camo.githubusercontent.com/f1c5d04994f0355b65cb704cbafc8947132a273a76f7a744256abb9a70884841/68747470733a2f2f696d672e736869656c64732e696f2f6769746875622f6c616e6775616765732f636f64652d73697a652f736f616e64736f5377456e2f636f6e74696e656e74616c2d696e646578)](https://camo.githubusercontent.com/f1c5d04994f0355b65cb704cbafc8947132a273a76f7a744256abb9a70884841/68747470733a2f2f696d672e736869656c64732e696f2f6769746875622f6c616e6775616765732f636f64652d73697a652f736f616e64736f5377456e2f636f6e74696e656e74616c2d696e646578)[![GitHub release (latest SemVer)](https://camo.githubusercontent.com/c2d8b02c540c6c456c21d1599ee7e9790722ee29c9d3c14ca7f0b07f3e0830b7/68747470733a2f2f696d672e736869656c64732e696f2f6769746875622f762f72656c656173652f736f616e64736f5377456e2f636f6e74696e656e74616c2d696e646578)](https://camo.githubusercontent.com/c2d8b02c540c6c456c21d1599ee7e9790722ee29c9d3c14ca7f0b07f3e0830b7/68747470733a2f2f696d672e736869656c64732e696f2f6769746875622f762f72656c656173652f736f616e64736f5377456e2f636f6e74696e656e74616c2d696e646578)[![GitHub Release Date](https://camo.githubusercontent.com/4116732ee1c4ab007130eebe8439c3199f640bae04548b6aa960152f2941b004/68747470733a2f2f696d672e736869656c64732e696f2f6769746875622f72656c656173652d646174652f736f616e64736f5377456e2f636f6e74696e656e74616c2d696e646578)](https://camo.githubusercontent.com/4116732ee1c4ab007130eebe8439c3199f640bae04548b6aa960152f2941b004/68747470733a2f2f696d672e736869656c64732e696f2f6769746875622f72656c656173652d646174652f736f616e64736f5377456e2f636f6e74696e656e74616c2d696e646578)[![Codacy branch coverage](https://camo.githubusercontent.com/604ee86d3ccb1d495c3b57d05bacdcde71fca115fcc89c93d9324dc43066a7f0/68747470733a2f2f696d672e736869656c64732e696f2f636f646163792f636f7665726167652f65653838313662653837376334396439616639326463313533316439363865332f6d61696e)](https://camo.githubusercontent.com/604ee86d3ccb1d495c3b57d05bacdcde71fca115fcc89c93d9324dc43066a7f0/68747470733a2f2f696d672e736869656c64732e696f2f636f646163792f636f7665726167652f65653838313662653837376334396439616639326463313533316439363865332f6d61696e) Continental index ================= [](#continental-index) PHP library for calculating the index of continentality - a numerical characteristic of continental climate. [![](./images/Continental-Index.png)](./images/Continental-Index.png) Requirements ------------ [](#requirements) This library only requires PHP >= 7.4 Setup ----- [](#setup) Add the library to your composer.json file in your project: ``` { "require": { "soandso/continental-index": "0.*" } } ``` Use [composer](http://getcomposer.org) to install the library: ``` $ php composer.phar install ``` Composer will install synop decoder library inside your vendor folder. Then you can add the following to your .php files to use the library with Autoloading. ``` require_once(__DIR__ . '/vendor/autoload.php'); ``` You can also use composer on the command line to require and install Grouping: ``` $ php composer.phar require soandso/continental-index ``` Usage ----- [](#usage) Instantiate the `Register` class with initialization data. ``` require_once dirname(__FILE__) . '/vendor/autoload.php'; use Soandso\ContinentalIndex\Register; $report = new Register($inputType, $source, $inputTempUnits, $outputTempUnits, $latitude); $inputType - Supported types of source data: Register::FILE Register::ARRAY Register::JSON $source - Input source: 1. File (Show file path) Source data structure: Year, space, temperature amplitude value Example: 2022 78.5 2. array: [ Year, temperature amplitude value ] Example: [ [2017, 80.9], [2018, 70.3], ............ ] 3. json: This format is an array (see above) encoded into a json string $inputTempUnits - Input temperature amplitude units: Register::FAHRENHEIT Register::CELSIUS $outputTempUnits - Output temperature amplitude units: Register::FAHRENHEIT Register::CELSIUS $latitude - Location latitude ``` To get the calculation of the continentality index, use the method `getIndex` ``` $index->getIndex(string $title, string $format, string $filePath = null); $title - Type index of continentality The following methods for calculating the continentality index are supported: 1. Hromov continentality index - Register::HROMOV_INDEX 2. Gorchinsky continentality index - Register::GORCHINSKY_INDEX 3. Conrad continentality index - Register::CONRAD_INDEX 4. Zenker continentality index - Register::ZENKER_INDEX $format - Output format Register::FILE Register::ARRAY Register::JSON $filePath - The path to the directory for extracting the results file ``` **Plotting** You can build a line graph of continentality index versus time for a given location. To do this, you need to use the `plot()` method of the `Register` class, passing it the calculated data that were obtained using `getIndex` (see above) `php Register::plot($indexAssets)` The `plot` method also takes as its second optional argument options for plotting. `php Register::plot($indexAssets, $options)` ``` $options = [ /** Show or hide the range selector widget (Only for Dygraph provider) **/ 'showRangeSelector' => null, //true or false /** Height, in pixels, of the range selector widget (Only for Dygraph provider) **/ 'rangeSelectorHeight' => null, //int /** Width, in pixels, of the chart **/ 'width' => null, //int /** Height, in pixels, of the chart **/ 'height' => null, //int 'title' => 'Continental index', /** Text to display to the left of the chart's y-axis **/ 'ylabel' => 'Index', //string /** Text to display below the chart's x-axis **/ 'xlabel' => 'Date', //string ]; ``` **Example usage** Index calculation ``` $index = new Register(Register::FILE, __DIR__ . '/amplitude.txt', Register::FAHRENHEIT, Register::CELSIUS, 45.5); $indexAssets = $index->getIndex(Register::HROMOV_INDEX, Register::FILE, __DIR__); ``` Plotting ``` Register::plot($indexAssets); ``` Specifying Custom Graph Options ``` Register::plot($indexAssets, [ 'showRangeSelector' => true, 'rangeSelectorHeight' => 30, 'title' => 'Hromov Index', ]); ``` Credits ------- [](#credits) Dygraphs - open source JavaScript charting library. () Standards --------- [](#standards) Continental index conforms to the following standards: - PSR-2 - Basic coding standard () - PSR-4 - Autoloader () - PSR-12 - Extended coding style guide () License ------- [](#license) Grouping is licensed under the GPLv2 License (). ### Health Score 21 — LowBetter than 18% of packages Maintenance20 Infrequent updates — may be unmaintained Popularity5 Limited adoption so far Community7 Small or concentrated contributor base Maturity44 Maturing project, gaining track record Bus Factor1 Top contributor holds 100% of commits — single point of failure How is this calculated?**Maintenance (25%)** — Last commit recency, latest release date, and issue-to-star ratio. Uses a 2-year decay window. **Popularity (30%)** — Total and monthly downloads, GitHub stars, and forks. Logarithmic scaling prevents top-heavy scores. **Community (15%)** — Contributors, dependents, forks, watchers, and maintainers. Measures real ecosystem engagement. **Maturity (30%)** — Project age, version count, PHP version support, and release stability. ### Release Activity Cadence Every ~6 days Total 6 Last Release 1539d ago ### Community Maintainers ![](https://avatars.githubusercontent.com/u/585980?v=4)[soandso](/maintainers/soandso)[@soandso](https://github.com/soandso) --- Top Contributors [![soandsoSwEn](https://avatars.githubusercontent.com/u/18630322?v=4)](https://github.com/soandsoSwEn "soandsoSwEn (54 commits)") --- Tags weatherclimatemeteorologyclimate changeclimatologycontinental index ### Code Quality TestsPHPUnit ### Embed Badge ![Health badge](/badges/soandso-continental-index/health.svg) ``` [![Health](https://phpackages.com/badges/soandso-continental-index/health.svg)](https://phpackages.com/packages/soandso-continental-index) ``` ### Alternatives [amwhalen/noaa Client library for NOAA's forecast and current weather services 301.5k](/packages/amwhalen-noaa) PHPackages © 2026 [Directory](/)[Categories](/categories)[Trending](/trending)[Changelog](/changelog)[Analyze](/analyze)