13 replies to this topic

[josie]

Hi does anyone have a good coordinate tranforming tool. I need these in wgs84.

Coordinates (UTM 3°) : X= 529,680.00 Y= 5,963,231.00

Thanks everyone!

[Hans van der Maarel]

Hi does anyone have a good coordinate tranforming tool. I need these in wgs84.

Coordinates (UTM 3°) : X= 529,680.00 Y= 5,963,231.00

Thanks everyone!

Is that UTM zone 3?

[josie]

Well despite what they have put which does look like zone 3, I think it must be zone 31 because it is in the Netherlands.

They also give Geographical coordinates: 03o 27' 02.810" E, 53 o 48' 56. 286" N

Does that help at all? :\

[Hans van der Maarel]

Well despite what they have put which does look like zone 3, I think it must be zone 31 because it is in the Netherlands.

They also give Geographical coordinates: 03o 27' 02.810" E, 53 o 48' 56. 286" N

Does that help at all? :\

Yes. It is indeed zone 31 and the corresponding WGS84 coordinates are:
Longitude 3.4494442 E
Latitude 53.814871 N

I used this site to run the translation. There's some very minor rounding errors in the result though.

[josie]

Thanks very much Hans,

I checked out the site you use and it is very helpful. The one I normally use is so overly complicated and I really don't like using it. So now I hav a new one!

Thanks again!

Josie

[VeroLJ]

Hi,

For simple coordinates conversions, I love PC Trans from the Dutch Hydrographic Office. It's very robust and accurate... and free!! And, you can convert lists of coordinates saved in a text file. It's probably not the easiest to use though.

http://www.hydro.nl/.../pctrans_en.htm
(you can also get a version in Dutch).

[frax]

For a little project activity, I had a need to create lines between points (in lat/long) but also to reproject - I got it all done in ArcGIS, using Hawth's tools - worked out very well.

Check out under the table tools there.

[josie]

This is probably very obvious but I have just started using Manifold and I can't seem to select just WGS84. I have something in UTM31 and I want to reproject it to WGS 84. I'm not entirely used to the program yet.

[josie]

um...sorry actually after all that I just finally figured it out. I selected standard/ latitude and longitude and in the tab underneath WGS84. Is that right?

[Hans van der Maarel]

um...sorry actually after all that I just finally figured it out. I selected standard/ latitude and longitude and in the tab underneath WGS84. Is that right?

Yes, that should be it. But be sure to do that under "Change projection" (where you specify which projection you want the data to be in) instead of "Assign projection" (where you specify which projection the data is in). Subtle difference, a world of pain if you mix them up... Yes, speaking from experience...

[josie]

Well for some reason the Manifold projection options baffled me a bit at first (and still do a little). ..and yes you are totally right about 'change' and 'assign' projection. At first I was not entirely clear about it. I think its because I am so used to using ArcGIS. I do really like Manifold alot though. I guess it takes some getting used to. I have to reorganise the way I do things and I am very unorganised as it is !

[josie]

I am really trying to project data in Manifold and I am having a fair bit of trouble. For example, I have a number of shapefiles which are in Projected coordinate system 'Mercator' and geographic 'GCS_WGS_1984'. These make up a map. I then have another shapefile in Projected coordinate system 'WGS_1984_UTM_zone_31N' and Geographic 'GCS_WGS_1984'. I brought both sets into manifold and assigned them a projection to the ones above. I then changes the projection of the second shapefile to the projection of the other one. This did not work and they are very far apart.

Clearly I am doing something very wrong but does anyone know what it is? I am very new to Manifold and I can't seem to get it right!

Thanks again!

[josie]

Just to update, this problem only happens with one set of shapefiles and they are in the mercator projection WGS 84. I do not know why but they end up miles out of where they should be. I did not have this problem in ArcGIS though.

[josie]

As usual, simple solution...

The centre of latitude was off. I just changed it and now it is fine. Seems to work ok now.

Thankyou anyway