*“6414
Proj.4: "+proj=aea +lat_1=34 +lat_2=40.5 +lat_0=0 +lon_0=-120 +x_0=0
+y_0=-4000000 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs"*

*Imagery
Proj.4: "+proj=aea +lat_1=34 +lat_2=40.5 +lat_0=0 +lon_0=-120 +x_0=0
+y_0=-4000000 +ellps=GRS80 +towgs84=-3.2,-5.7,2.8,0,0,0,0 +units=m
+no_defs"*

* *

*The
problem is the +towgs84=-3.2,-5.7,2.8,0,0,0,0 transformation
value is applied when changing the projection from EPSG 6414 to EPSG 3857
that we must do when creating tile map services.”*

Does anyone have any ideas how i can resolve this issue?

]]>

I am having a problem with reference datum Arc 1960. There seems to be another one in Global mapper which is Arc_1960. What is the difference between these two? Which of them is the correct one, there seem to be about 2.4m shift between them. Can any one help please with advising which one is the correct one to use?

Clarence]]>

regards,

Xtov]]>

any ideas how to do this?

I think i need to copy the file BWTA.GSB (which contains the grid of shift Information in binary NTv2-Format) to a certain directory , but how do I make sure that it is used in the transformation process?

Thanks in advance

Jan

]]>
Jan

When using World Imagery I sometimes find that I need to use a different transformation. Usually I have used another popular GIS package to apply the transformation to the basemap before exporting out as a image and importing into GM.

Is it possible to do all this in GM v19.1? I can seem to find a list of transformations to try and I have no idea how to extract the transformation information as a file from the other GIS package to use in GM to correct the imagery.

Any ideas would be welcome.

Cheers,

Steve]]>

and for the output, the origin lattitute 103.5

and then the messsage error comes.

is there any solution?

thx

.

]]>

i have a problem with "Hotine Oblique Mercator B" seems that is insensitive at AZIMUTH ANGLE parameter.

For replicating the problem try this, using coordinate converter:

Input Coordinate:

X=392937.9206

Y=5818466.7383

Input coordinate system:

EPSG 25833

Output coordinate system:

HOTINE OBLIQUE MERCATOR B

DATUM: WGS84

PLANAR UNITS: METERS

CENTER SCALE FACTOR: 1

AZIMUT ANGLE:**XXXXXXXX**

AMIUTH PT 13.421146

ORIGIN LATITUDE 52.504883

FALSE EAST 1000

FALSE NORTH 2000

AZIMUT ANGLE:

AMIUTH PT 13.421146

ORIGIN LATITUDE 52.504883

FALSE EAST 1000

FALSE NORTH 2000

with proj.4

**XXXXXXXX = 5 then X=1087.6814 and Y=2109.5443**

**XXXXXXXX = 30 then X=1033.1709 and Y=2136.3366**

**XXXXXXXX = 45 then X=996.7541 and Y=2140.2763**

**XXXXXXXX = 60 then X=960.5585 and Y=2134.6564**

**XXXXXXXX = -45 then X=1140.2763 and Y=2003.2459**

Many Thanks for attention

Mario

]]>

Thank you in advance-

Daniel]]>

In Switzerland we changed the coordinate system lately. So we have to deal with different systems all the time.

I have vector data with the projection "PROJ_DESC=Swiss Grid / CH1903 / meters PROJ_DATUM=SWISS GRID (CH1903)" and another source with data with the projection "PROJ_DESC=Swiss Grid (LV95) / CH1903+ / meters PROJ_DATUM=SWISS GRID (CH1903+)"

When I load the two sources in the respective projection I get a small shift in the position.

What is Global Mapper doing? It seems that there is a transformation because the x/y-coordinates are totally different in the two sources.

How can you explain the small shift in my case x 0.8m y 0.15m?

Do I oversee something?

Thank you.

Rainer

]]>

I apologize if this question is a repeat of another, but I'm very new to Global Mapper and can't seem to find the right post that addresses the reprojection process that I need to follow. I'm running v19.1.

I received an XYZ text file from a client in the Colorado North 501 NAD27 coordinate system, but the files that our company uses internally are of the UTM13N coordinate system. How can I reproject the client's original file to our internal coordinate system and export the resulting file to an XYZ or LAS file?

Thanks for your help!

]]>

Thanks

]]>

- I have checked the "Save Projection in LAS/jLAZ header" in the export LiDAR dialog

- I have saved in the 1.2, 1.4 and I still can not see the information in 3rd party software (QT Reader).

**The original LAS file has the correct projection information when opened in 3rd party software packages (QT Reader). ]]>

]]>

thanks in advance

]]>

We have terrestrial LiDAR scans of sports stadiums, and are looking to create local relative coordinate systems for each one (us survey ft). For baseball stadiums, we would like the origin 0,0,0 to be the tip of home plate. The x-axis needs to align with the line running from home plate to right field pole, and y-axis going straight through 2nd base. Positive z being up.

Looking for the most effective way of doing this. I'm thinking of just creating a shift using the coordinates of home plate, then applying a rotation until the axis aligns with the features I mentioned above. I'm not really confident/comfortable that this is the best way to do this.

This would be done at quite a few stadiums, so any help would be much appreciated!

Thanks]]>

]]>

Our GM v11 default workspace projection and datum settings:

Projection: UTM

Zone: 17 (Cleveland, OH)

Datum: WGS84

Planar Units: FEET (U.S.Survey)

Elevation: FEET

(Note: the maximum area we are working with covers 20 nautical miles diameter)

Most of the datasets we are using are provided with PRJ files so everything is layering properly. But - we have a few problems:

1) A couple of the layers/dataset provided were developed/created using a automated tools that are supposedly spitting out the files as WGS84 datum and "FLAT EARTH" projection. Therefore - they aren't lining up with our other layers. They are close but them slightly skewed and/or rotated. If we go back to those original DWG files and setup the projection to use "NAD 1983 HARN StatePlane Ohio South FIPS 3402 (US Feet).prj" the drawing lines up perfect with everything else.

-What is the equivalent to "Flat Earth" in GM's projection/datum settings?

-Does the projection setting "Orthographic" in GM project geospatial points on a flat plane aka "Flat Earth"?

2) When we try to convert a "State Plane, Geographic(Lat/Lon), UTM, or any other GM projection to "orthographic" projection, I keep getting a message in the status bar saying "Coordinate out of range" after selecting "Zoom selected Layer(s)" from the layer property sheet(popup menu). We are changing the default projection from "Geographic(lat/lon)" to "orthographic" via the configuration projection dialog tab.

-Is there something we need to do to allow "Orthographic" projection to convert properly?

Thanks for your help!]]>

Following point is in UTM36N WGS84 X=680137.283 Y=3607822.050 |

]]>

for another program it is necessary that I change the data of the projection. I work in UTM ETRS89 - zone 32. So a point with LiDAR or DSM data is referenced as follows:

point location: 32530037.000 6069262.000

For another program, it is necessary that the leading 32 for all points / features is shortened, because this can not work with so many places. Is this change possible in GM and if so, how?

]]>Just upgraded to GM v19 (from v16), so I'm still coming to terms with all the changes made in the last few years.

I have imported an air photo from a drone of a cemetery, and have measured the width and length of one particular headstone using a measuring tape. I assigned one corner of the headstone as MGA coordinates 0,0, and then rectified the air photo using the headstone measurements.

While this isn't perfectly accurate, it's good enough for my current needs (and budget).

I now need to draw grids on the air photo. Unfortunately, when I go to do so, I get an error message saying "unable to project anchor point to lat/long" (even though my projection is set to MGA). Screenshot attached.

I've never rectified aerial imagery in this fashion before, but today is also the first time I've used GM v19.

Can anyone please suggest how I should go about doing this?

A copy of the GM project file can be found here.

Thanks in advance,

Dave

]]>

]]>

How do I go about doing this?

Website:

http://www.olmweb.dot.state.mn.us/tech/Projections.htm

MnCon:

http://www.olmweb.dot.state.mn.us/lis/software/MnCon.html]]>

This is the datum information it gives:

"

How do I translate that into the projection settings in GM?

Thanks for any help...

]]>

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