I need to convert shapefiles (.shp) to .mdb file.
I tried to use GDAL libriary, but it supports only read operations on .mdb file, and It is why I cannot create a new .mdb source.
In the future I will need to automatize conversion by wrapping in .NET environment.
Do you have some experience in similar issues?
Related
I would like to process Landsat8 raw data with OCaml. The data is stored in TIF files. An example of such a file can be found here:
http://landsat-pds.s3.amazonaws.com/L8/139/045/LC81390452014295LGN00/LC81390452014295LGN00_B1.TIF
How can I read a TIF file in OCaml? Is there a library that already does this?
If you're working with a Landsat or other GeoTIFF image you may want to use bindings to GDAL for more complete support: https://github.com/hcarty/ocaml-gdal and http://gdal.org/
GDAL allows you to access the raw values and their geospatial information - location, projection and whatever else is included in the underlying TIFF.
I have not used it in many years, but there is a library named camlimages that claims to support TIF files. You can install it with OPAM.
I have a subset of the data set called as 'million song dataset' available on the website (http://labrosa.ee.columbia.edu/millionsong/) on which I would like to perform data mining operations on SAS Enterprise Miner (13.2).
The subset I have downloaded contains 10,000 files and they are all in HDF5 format.
How do you convert hdf5 files into a format that is readable by SAS Enterprise Miner(sas7bdat)
On Windows there is an ODBC driver for HD5. If you have SAS/ACCESS ODBC then you can use that to read the file.
I don't think it's feasible to do this directly, as hdf5 seems to be a binary file format. You might be able to use another application to convert hdf5 to a plain text format and then write SAS code to import that.
I think some of the other files on this page might be easier to import:
http://labrosa.ee.columbia.edu/millionsong/pages/getting-dataset
Currently I'm just saving the file as MS-DOS CSV with excel. I'm looking for the fastest way (in terms of writing the code) of doing it automatically.
I strongly prefer C++, but any simple executable program I can call from a C++ app would do.
Unzip the xslx file with eg WinZip and have a look at the resulting files. This may help.
I want to use some of the datasets available at the website of the Weka to perform some
experiments with Neural Networks.
What do I have to do to read the data?
I downloaded the datasets and they were saved as .arff.txt so I deleted the extension of .txt to have only .arff. So I used this file as an ipnut but an error occurs.
Which is the right way to read data?
Do I have to write code?
Please help me.
Thank you
I'm using Weka 3.6.6 and coc81.arff opens just fine. You are using Weka 3.7.x, which is the development branch of Weka. I suggest that you download 3.6.6 or 3.6.7 (the latest stable release) and try to open the file again.
There is also another simple throw...
open your dataset file in excel in my case MS Excel2010, format fields intype.
and save as 'csv',
then reload that csv file in the weka explorer and save on the local drive as arff format.
may be this help.
I have seen programs exporting to Excel in two different ways.
Opening Excel and entering data cell by cell (while it is running it looks like a macro at work)
Creating an Excel file on disk and writing the data to the file (like the Export feature in MS Access)
Number 1 is terribly slow and to me it is just plain aweful.
Number 2 is what I need to do. I'm guessing I need some sort of SDK so that I can create Excel files in C++.
Do I need different SDKs for .xls and .xlsx?
Where do I obtain these? (I've tried Googling it but the SDKs I've found looks like they do other things than providing an interface to create Excel files).
When it comes to the runtime, is MS Office a requirement on the PC that needs to create Excel files or do you get a redistributable DLL that you can deploy with your executable?
You can easily do that by means of the XML Excel format. Check the wikipedia about that:
http://en.wikipedia.org/wiki/Microsoft_Excel#XML_Spreadsheet
This format was introduced in Excel 2002, and it is an easy way to generate a XLS file.
You can also try working with XLS/XLSX files over ODBC or ADO drivers just like databases with a limited usage. You can use some templates if you need formatting or create the files from stratch. Of course you are limited by playing with the field values that way. For styling etc. you will need to use an Excel API like Microsoft's.
I'm doing this via Wt library's WTemplate
In short, I created the excel document I wanted in open office, and save-as excel 2003 (.xml) format.
I then loaded that in google-chrome to make it look pretty and copied it to the clipboard.
Now I'm painstakingly breaking it out into templates so that Wt can render a new file each time.