7 replies to this topic

[GIStummy]

I've got some .csv files and .xyz files of bathymetry data that I need to get into ArcMap. I need to make contour lines of the data. Does anyone know how to get them into a file extension that ArcMap uses, like a grid? Thanks!

[Martin Gamache]

To get a point file into a grid file you will need to interpolate using some kind of gridding software. Check this thread
for some ideas on software. The interpolation method you choose really depends on the kind of data.

mg

[DaveB]

I think you could bring them in as a point feature layer and then use Spatial Analyst to interpret to a grid. I haven't actually tried it myself, but I know you can make point data from tabular data and I know you can create rasters from vector data.

[GIStummy]

I think you could bring them in as a point feature layer and then use Spatial Analyst to interpret to a grid. I haven't actually tried it myself, but I know you can make point data from tabular data and I know you can create rasters from vector data.

<{POST_SNAPBACK}>

Thank you Dave!!

[YZT_CNG]

I think the detailed steps are following:
1. save your *.csv file as *.dbf in EXCEL.
2. In ARCMAP, Tools-->Add XY data-->choose corresponding field as X and Y
3. Choose all points and export as a *.shp file.
4. convert *.shp to coverage.
5. define the porjection of the coverage as you know.
6. In 3D Analyst, use pnt file as height source and the boundary file as triangulate to create tin, then convert tin to raster. That's all.

[Lui]

The other alternative is Global Mapper. You can directly import and triangulate .xyz data in elevation model. Global Mapper export also supports many digital elevation formats (Arc GRID is one of them). One of my favorite programs: powerfull and cheap.

Lui

[jaize]

Thanks guys.i have my points from a txt file now.how do I make them a TIn file in Arcgis.How do I get the coverage ?

Edited by jaize, 12 November 2008 - 04:34 AM.

[jaize]

Thanks guys.i have my points from a txt file now.how do I make them a TIn file in Arcgis.How do I get the coverage ?

Got it ! 3D Analysit