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Update version to 2.1.0
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maRci002 committed Aug 20, 2022
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4 changes: 4 additions & 0 deletions CHANGELOG.md
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# Changelog

## 2.1.0

- Add nadgrids support

## 2.0.0

- Stable null safety release.
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22 changes: 11 additions & 11 deletions README.md
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Expand Up @@ -17,10 +17,10 @@ dependencies:
There are 3 predefined Projections and 5 aliases by default:
- [EPSG:4326](http://epsg.io/4326), which has the following alias:
- [EPSG:4326](https://epsg.io/4326), which has the following alias:
- WGS84
- [EPSG:4269](http://epsg.io/4269)
- [EPSG:3857](http://epsg.io/3857), which has the following aliases:
- [EPSG:4269](https://epsg.io/4269)
- [EPSG:3857](https://epsg.io/3857), which has the following aliases:
- EPSG:3785
- GOOGLE
- EPSG:900913
Expand All @@ -38,7 +38,7 @@ Proj4dart supports `Proj4 definition strings`, `OGC WKT definitions` and `ESRI W

#### With Proj4 string definition

If you wish to define your own projection you can create it with a valid Proj4 string (here for [EPSG:23700](http://epsg.io/23700)):
If you wish to define your own projection you can create it with a valid Proj4 string (here for [EPSG:23700](https://epsg.io/23700)):

```dart
+proj=somerc +lat_0=47.14439372222222 +lon_0=19.04857177777778 +k_0=0.99993 +x_0=650000 +y_0=200000 +ellps=GRS67 +towgs84=52.17,-71.82,-14.9,0,0,0,0 +units=m +no_defs
Expand All @@ -59,7 +59,7 @@ For full example visit [example/proj4dart_example.dart](example/proj4dart_exampl

#### With OGC WKT definition

If you wish to define your own projection you can create it with a valid OGC WKT string (here for [EPSG:23700](http://epsg.io/23700)):
If you wish to define your own projection you can create it with a valid OGC WKT string (here for [EPSG:23700](https://epsg.io/23700)):

```dart
PROJCS["HD72 / EOV",GEOGCS["HD72",DATUM["Hungarian_Datum_1972",SPHEROID["GRS 1967",6378160,298.247167427,AUTHORITY["EPSG","7036"]],TOWGS84[52.17,-71.82,-14.9,0,0,0,0],AUTHORITY["EPSG","6237"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4237"]],PROJECTION["Hotine_Oblique_Mercator_Azimuth_Center"],PARAMETER["latitude_of_center",47.14439372222222],PARAMETER["longitude_of_center",19.04857177777778],PARAMETER["azimuth",90],PARAMETER["rectified_grid_angle",90],PARAMETER["scale_factor",0.99993],PARAMETER["false_easting",650000],PARAMETER["false_northing",200000],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Y",EAST],AXIS["X",NORTH],AUTHORITY["EPSG","23700"]]
Expand All @@ -80,7 +80,7 @@ For full example visit [example/proj4dart_ogc_wkt_example.dart](example/proj4dar

#### With ESRI WKT definition

If you wish to define your own projection you can create it with a valid ESRI WKT string (here for [EPSG:23700](http://epsg.io/23700)):
If you wish to define your own projection you can create it with a valid ESRI WKT string (here for [EPSG:23700](https://epsg.io/23700)):

```dart
PROJCS["HD72_EOV",GEOGCS["GCS_HD72",DATUM["D_Hungarian_1972",SPHEROID["GRS_1967",6378160,298.247167427]],PRIMEM["Greenwich",0],UNIT["Degree",0.017453292519943295]],PROJECTION["Hotine_Oblique_Mercator_Azimuth_Center"],PARAMETER["latitude_of_center",47.14439372222222],PARAMETER["longitude_of_center",19.04857177777778],PARAMETER["azimuth",90],PARAMETER["scale_factor",0.99993],PARAMETER["false_easting",650000],PARAMETER["false_northing",200000],UNIT["Meter",1]]
Expand Down Expand Up @@ -120,7 +120,7 @@ final bytes = (await rootBundle.load(fileName)).buffer.asUint8List();
Projection.nadgrid('key', bytes);
```

then use the given key in your definition, e.g. `+nadgrids=@key,null`. See [Proj4 General Parameters](http://proj.maptools.org/gen_parms.html).
then use the given key in your definition, e.g. `+nadgrids=@key,null`. See [Proj4 General Parameters](https://proj.maptools.org/gen_parms.html).

Nadgrid example:

Expand Down Expand Up @@ -214,7 +214,7 @@ Proj4dart was tested with

Forward and inverse transformations were both performed and checked in each case. The expected forward and inverse results were pre-calculated using proj4js ([test/results/all_proj4_results.dart](test/results/all_proj4_results.dart), [test/results/all_proj4_ogc_wkt_results.dart](test/results/all_proj4_ogc_wkt_results.dart), [test/results/all_proj4_esri_wkt_results.dart](test/results/all_proj4_esri_wkt_results.dart)).

The following table shows the avarage deltas of different Projections (using [EPSG:4326](http://epsg.io/4326.proj4) point of `[17.888058560281515, 46.89226406700879]` and transformed to [Custom CRS defined with Proj4 definition string](test/data/all_proj4_defs.dart#L65) which gave the `forward result` then transformed back the received forward result which gave the `inverse result`):
The following table shows the avarage deltas of different Projections (using [EPSG:4326](https://epsg.io/4326.proj4) point of `[17.888058560281515, 46.89226406700879]` and transformed to [Custom CRS defined with Proj4 definition string](test/data/all_proj4_defs.dart#L65) which gave the `forward result` then transformed back the received forward result which gave the `inverse result`):

| Projection | No. tests | avg delta forward_x | avg delta forward_y | avg delta inverse_x | avg delta inverse_y |
|:---------------------------------------------|:----------|:-------------------------|:-------------------------|:--------------------------|:--------------------------|
Expand Down Expand Up @@ -246,15 +246,15 @@ The following table shows the avarage deltas of different Projections (using [EP
| **Universal Transverse Mercator Projection** | 1279 | *3.4847229055075836e-10* | *3.429655454604303e-10* | *3.4304936617033767e-15* | *2.4999548951684524e-15* |
| **Van der Grinten Projection** | 2 | *3.3760443329811096e-9* | *2.3283064365386963e-9* | *0.0* | *0.0* |

Example (using [EPSG:4326](http://epsg.io/4326.proj4) point of `[17.888058560281515, 46.89226406700879]` and transformed to [EPSG:23700](http://epsg.io/23700.proj4) defined with Proj4 definition string):
Example (using [EPSG:4326](https://epsg.io/4326.proj4) point of `[17.888058560281515, 46.89226406700879]` and transformed to [EPSG:23700](https://epsg.io/23700.proj4) defined with Proj4 definition string):

| LIBRARY | forward_x | forward_y | inverse_x | inverse_y |
|:--------------|:------------------|:-------------------|:--------------------|:------------------|
| **proj4dart** | 561651.8408065987 | 172658.61998377228 | 17.888058565574845 | 46.89226406698969 |
| **proj4js** | 561651.8408065989 | 172658.61998377228 | 17.888058565574852 | 46.89226406698969 |
| *delta* | *0.0000000002* | *0.0* | *0.000000000000007* | *0.0* |

In some cases also manual PostGIS testing (PostgreSQL 12.1, PostGIS 3.0.0 r17983) was performed such as the following (using [EPSG:4326](http://epsg.io/4326.proj4) point of `[17.888058560281515, 46.89226406700879]` and transformed to [EPSG:23700](http://epsg.io/23700.proj4) defined with Proj4 definition string):
In some cases also manual PostGIS testing (PostgreSQL 12.1, PostGIS 3.0.0 r17983) was performed such as the following (using [EPSG:4326](https://epsg.io/4326.proj4) point of `[17.888058560281515, 46.89226406700879]` and transformed to [EPSG:23700](https://epsg.io/23700.proj4) defined with Proj4 definition string):

| LIBRARY | forward_x | forward_y | inverse_x | inverse_y |
|:--------------|:------------------|:-------------------|:--------------------|:-------------------|
Expand All @@ -268,4 +268,4 @@ In some cases also manual PostGIS testing (PostgreSQL 12.1, PostGIS 3.0.0 r17983

## Authors

Proj4dart was ported from proj4js by @maRci002 and [Gergely Padányi-Gulyás (@fegyi001)](https://twitter.com/fegyi001)
Proj4dart was ported from proj4js by @maRci002 and [Gergely Padányi-Gulyás (@fegyi001)](https://twitter.com/fegyi001).
2 changes: 1 addition & 1 deletion analysis_options.yaml
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# see https://github.com/dart-lang/pedantic#enabled-lints.
include: package:pedantic/analysis_options.yaml

# For lint rules and documentation, see http://dart-lang.github.io/linter/lints.
# For lint rules and documentation, see https://dart-lang.github.io/linter/lints.
# Uncomment to specify additional rules.
# linter:
# rules:
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2 changes: 1 addition & 1 deletion pubspec.yaml
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name: proj4dart
description: Proj4dart is a Dart library to transform point coordinates from one coordinate system to another, including datum transformations (Dart version of proj4js/proj4js).
version: 2.0.0
version: 2.1.0
homepage: https://github.com/maRci002/proj4dart

environment:
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