How to convert proj params into custom CS

[grudzinski (Roman Grudzinski)]

I have this proj params:

proj=omerc +lat_0=56.524876 +lonc=29.82021 +alpha=-0.00001 +k=0.9999868267340996 +x_0=2180587.970184191 +y_0=356635.5946894459 +gamma=0.9385180543440649 +ellps=krass

I want to convert it to custom CS in EmlidReach app. Please help. I tried, it is not working. Why I can’t edit and fix my custom CS? It is very hard create new project, then create new custom CS to check new custom CS.

[grudzinski (Roman Grudzinski)]

I imported coordinates in WGS84 format into project, but it shows this message.

Name,Northing,Easting,Elevation
1,56.505272964051,29.7232638352869,0
2,56.505253400913,29.7233934303051,0
3,56.505221256325,29.7240337691687,0
4,56.505076457048,29.7241332811426,0
5,56.504735826992,29.7244953916845,0
6,56.505052357109,29.7247883007795,0
7,56.504669807835,29.7252904607235,0
8,56.504372781543,29.7253095847392,0
9,56.504324043528,29.7258252129367,0
10,56.504667334604,29.7263649651064,0
11,56.505024351581,29.7261527507144,0
12,56.505018179768,29.7267868896587,0
13,56.505466679768,29.7268905836859,0
14,56.505722479903,29.7275767525714,0
15,56.505779809891,29.7282207248777,0
16,56.505671412402,29.7287998388324,0
17,56.505884024588,29.7293602257358,0
18,56.502895583825,29.7326166503812,0
19,56.502692050417,29.7322210122015,0
20,56.502431745109,29.7319628066140,0
21,56.502693524352,29.7271229545345,0
22,56.502894989180,29.7273609274051,0
23,56.503109187191,29.7272121073879,0
24,56.503050515246,29.7268896451666,0
25,56.502933135857,29.7262871151096,0
26,56.502993416774,29.7259223445166,0
27,56.503183517284,29.7258808346935,0
28,56.503373705973,29.7258391592053,0
29,56.503445811914,29.7254530520179,0
30,56.503435529543,29.7248087480841,0
31,56.504001601056,29.7224465156360,0
32,56.504051963080,29.7222066239582,0
33,56.504662458551,29.7229535985376,0
34,56.506267103657,29.7293416260401,0
35,56.506560695128,29.7295588164641,0
36,56.506657810732,29.7299463538419,0
37,56.506763746956,29.7308961105133,0
38,56.507094233251,29.7319662070464,0
39,56.507001791474,29.7320563865667,0
40,56.506354470706,29.7314047701456,0
41,56.506069181110,29.7314025188147,0
42,56.505760153082,29.7315722242711,0
43,56.505557627371,29.7317854649772,0
44,56.505519821143,29.7322184010393,0
45,56.505711138190,29.7323932335348,0
46,56.505709806128,29.7327535384934,0
47,56.506017645452,29.7328483136769,0
48,56.506029320784,29.7332070693552,0
49,56.505944616437,29.7338510371291,0
50,56.505693998499,29.7343001819156,0
51,56.505515695247,29.7344280115031,0
52,56.505486105840,29.7348571089283,0
53,56.505349347136,29.7349806875958,0
54,56.505259371842,29.7346513964464,0
55,56.505042226320,29.7346461364829,0
56,56.504766676961,29.7345465841141,0
57,56.504796654065,29.7358440354499,0
58,56.504317873017,29.7353325518455,0
59,56.503459752532,29.7340167005373,0
60,56.503140423716,29.7333426271828,0

[kirill.pavlyuchuk]

Hi Roman,

Welcome to our forum!

This message is shown because you imported points with geographic coordinates (latitude, longitude), while there are Northing and Easting in the columns’ title. So, you need to replace it on Latitude and Longitude, and put Longitude column right after the Name. You can check how it looks in the modified file from the zip archive.
points1.csv.zip (2.1 KB)

I also created the custom CS with the given parameters. It is Oblique Mercator projection. However, there are two variants in ReachView 3. Variant A uses false easting/northing defined at the natural origin of the coordinate system.
Variant B uses false easting/northing defined at the projection center. Since I don’t have any info about the origin of the coordinate system, I’ve chosen Variant A. You can see the result in the screenshots below to check if it’s correct.

Please note, that ReachView 3 converts all imported points with geographic coordinates into the project’s coordinate system. So, you’ll obtain local coordinates of points.