`GeodesiCL`: A little journey into Geometric Geodesy.

Attention: We are ready to go!!

To begin with

This package was created to introduce topographical and related engineers in the area of Topography and Geodesy as a basic introduction to Geometric Geodesy applying the necessary basic formulas.

This was a project created between Diego Alarcón and Karla Riquelme seeing the need to introduce the new generation of professionals in the learning of software language and in turn present free software.

Installation

Install system dependencies

Please make sure that the GDAL libraries are installed on your system:

Windows: use the OSGeo4W installer.
Ubuntu: sudo apt install gdal-bin libgdal-dev
MacOS: brew install gdal --HEAD or brew install gdal

For more information on GDAL installation Click here!

We currently have two ways to install this package, as it is not yet finalized for posting to CRAN Project.

First option

After we already have the system dependencies, to use this package you should install R & RStudio. Next, you need to install the devtools package in order to start with the installation of the GeodesiCL package, then just copy and paste the following command into the RStudio console:

install.packages("devtools")
devtools::install_github("diegoalarc/GeodesiCL")

Second option

If you already have experience using R & RStudio, you could just copy the following command:

install.packages("GeodesiCL")

Inside the package

Check the PDF manual here.

Quick overview

The Ellipsoids within the package are as follows:

`Number`	`Description`	`Ellipsoids`	`a`	`1/f`
1	Provisional Southamerican 56	PSAD56	6378388	297
2	South American Datum 69	SAD69	6378160	298.25
3	MERIT 1983	MERIT	6378137	298.257
4	Soviet Geodetic System 85	SGS85	6378136	298.257
5	GRS 1980(IUGG 1980)	GRS80	6378137	298.257222101
6	IAU 1976	IAU76	6378140	298.257
7	Airy 1830	airy	6377563.396	299.3249646
8	Appl. Physics. 1965	APL4.9	6378137	298.25
9	Naval Weapons Lab. 1965	NWL9D	6378145	298.25
10	Modified Airy	mod_airy	6377340.189	6356034.446
11	Andrae 1876 (Den. Iclnd.)	andrae	6377104.43	300
12	Andrae 1876 (Denmark Iceland)	danish	6377019.2563	300
13	Australian Natl & S. Amer. 1969	aust_SA	6378160	298.25
14	GRS 67(IUGG 1967)	GRS67	6378160	298.247167427
15	GSK-2011	GSK2011	6378136.5	298.2564151
16	Bessel 1841	bessel	6377397.155	299.1528128
17	Bessel 1841 (Namibia)	bess_nam	6377483.865	299.1528128
18	Clarke 1866	clrk66	6378206.4	6356583.8
19	Clarke 1880 mod.	clrk80	6378249.145	293.4663
20	Clarke 1880 (IGN).	clrk80ign	6378249.2	293.466021293627
21	Comm. des Poids et Mesures 1799	CPM	6375738.7	334.29
22	Delambre 1810 (Belgium)	delmbr	6376428	311.5
23	Engelis 1985	engelis	6378136.05	298.2566
24	Everest 1830	evrst30	6377276.345	300.8017
25	Everest 1948	evrst48	6377304.063	300.8017
26	Everest 1956	evrst56	6377301.243	300.8017
27	Everest 1969	evrst69	6377295.664	300.8017
28	Everest (Sabah & Sarawak)	evrstSS	6377298.556	300.8017
29	Fischer (Mercury Datum) 1960	fschr60	6378166	298.3
30	Modified Fischer 1960	fschr60m	6378155	298.3
31	Fischer 1968	fschr68	6378150	298.3
32	Helmert 1906	helmert	6378200	298.3
33	Hough	hough	6378270	297
34	International 1909 (Hayford)	intl	6378388	297
35	Krassovsky 1942	krass	6378245	298.3
36	Kaula 1961	kaula	6378163	298.24
37	Lerch 1979	lerch	6378139	298.257
38	Maupertius 1738	mprts	6397300	191
39	New International 1967	new_intl	6378157.5	6356772.2
40	Plessis 1817 (France)	plessis	6376523	6355863
41	PZ-90	PZ90	6378136	298.25784
42	Southeast Asia	SEasia	6378155	6356773.3205
43	Walbeck	walbeck	6376896	6355834.8467
44	WGS 60	WGS60	6378165	298.3
45	WGS 66	WGS66	6378145	298.25
46	WGS 72	WGS72	6378135	298.26
47	WGS 84	WGS84	6378137	298.257223563
48	Normal Sphere (r=6370997)	sphere	6370997	6370997

Functions

Here you can see the functions contained in the package. Is it possible to read its description by copying to the console ?function or if you want to see an example just using example(function) like the following:

Check out each example, since most functions work with data.frame that has a specific order for its data.

arch: Rope reduction to elliptical arch.

?arch

example(arch)

cartesian: To convert from Geographic coordinate to Cartesian coordinate.

?cartesian

example(cartesian)

E2: To calculate 1-e^2.

?E2

example(E2)

E3: To calculate 1-e^2*sen(lat)^2.

?E3

example(E3)

geodesic: To convert from Cartesian coordinate to Geographic coordinate.

?geodesic

example(geodesic)

geodis: Reduction of the horizontal distance to the Ellipsoid.

?geodis

example(geodis)

LongLatToUTM: To convert from Geographic coordinate to UTM coordinate.

?LongLatToUTM

example(LongLatToUTM)

M: To calculate the value of M.

?M

example(M)

N: To calculate the value of N.

?N

example(N)

PlotLongLat: To plot using Geographic coordinate.

?PlotLongLat

example(PlotLongLat)

radians: To convert separated data in Degrees Minutes and Seconds to Radians.

?radians

example(radians)

rSL: To calculate the value of r, S and L.

?rSL

example(rSL)

scalfactor: To calculate scale factor calculation.

?scalfactor

example(scalfactor)

sexagesimal: To convert separated data in Degrees Minutes and Seconds to Decimal degrees.

?sexagesimal

example(sexagesimal)

TO_TM: To convert from Geographic coordinate to TM.

?TO_TM

example(TO_TM)

UTMtoLongLat: To convert from UTM to Geographic coordinate.

?UTMtoLongLat

example(UTMtoLongLat)

UTM_zone_hemisphere: To find the zone hemisphere from Longitude and Latitude the UTM zone.

?UTM_zone_hemisphere

example(UTM_zone_hemisphere)

Interesting fact

As entertaining fact, the name of the package is because geodesy is written geodesia in Spanish and CL represents the acronym of my country Chile but strangely you can see an A writing GeodesiA in Spanish (lol).

Contribution

We do hope you enjoy the package and give us your feedback in order to make this package better, easy and accurate as possible! Open an issue to start a discussion: