I'm trying to create a program which takes the coordinates from a csv-file and turns it into a shapefile. I downloaded the GeoTools libraries but I can't get the code to work...
In order to do this, you'll want to create a SimpleFeatureType and SimpleFeatures from the rows in the CSV, and then use the ShapefileDataStore to write those features out to disk.
This tutorial [1] in the documentation does just that. Are you using that tutorial or having trouble with something else?
http://docs.geotools.org/latest/userguide/tutorial/feature/csv2shp.html
As an aside, if this is a one-time or otherwise infrequent operation which can be done manually, I'd recommend trying out QGIS. QGIS is a desktop GIS application and for turning a CSV in a shapefile, it'd require no programming.
Related
I'm looking for some info on how to create a .vsdx file in Java without any commercial libraries. According to other questions it seems to be pretty tough.
As a source we have a different, probably unknown file format called .epml that contains graphical information of EPCs which we should be able to convert to a .xml file. As far as I understand the .vsdx format so far, that's one of many files in the unzipped .vsdx required. I'd be glad if anyone could tell me about my options how to implement/create all the other files.
EDIT: The goal here is to be able to convert the graphic information of the .epml file so Visio is able to read & display it as in the source. Therefore, it doesn't have to be a .vsdx file if there are other possible options.
Thanks!
EPML is a not an unknown format, it is an interchange format for EPC tools. Just try to google it :)
I would suggest you convert your .epml files to .svg (there are free open source converters available, like epml2svg). Visio can read and show .svg files. Means - writing code does not seem to be required to achieve your goal (to convert .epml files to something Visio can show). AFAR there is online version of the tool as well - you upload EPML file, get back SVG, and just open it in Visio - that's it.
Side note - there are companies, like bpm-x for example, specializing in BPM tool-to-tool diagram conversion. Maybe they already have a solution for your original tool.
The .VSDX file is "office xml" format, that is also open and documented. But it's pretty tough to generate file from scratch, you are right. So in principle you could start with any code that is capable of handling open xml packages. Microsoft has OpenXML SDK, but that's .NET (MSDN HOWTO assumes you are using .NET, but explains basics of what the open xml package consists of)
AFAIK, for java, there are no open source visio libraries you could use. Java and Visio seem to live in parallel universes. The only viable commercial option I've heard of seem to be Aspose.
Interesting - whilst I cannot give a final answer, here are some thoughts:
Question 1: Why would you want to avoid commercial tools, when the final result file will require some - namely "Visio"?
1) Creating Visio files from XML:
Create template XMLs from a VSDX. Identify the files, that you need to edit. From what I've seen, these should be the masters and the pages files. Being able to make an XML from EPML, you should also know how to adapt it to a new structure.
This solution is probably by far the most tedious and less flexible.
2) Use Visio automation:
Presuming that the final document will need more than just graphics, namely shape data as well, an easier solution would consist of creating the graphics first
a) as SVG and import into Visio
b) even easier - automated drawing by Visio's automation capabilities (VBA, .Net, ...). The shapes to drop would already have been prepared as masters will all the relevant data and behaviour settings.
Then you would populate the data by means of one of the many data linking features (Wizard, Standard data linking, ODBC connections, etc.)
I have a question related to Weka. I have data and I want to visualize them. I use k-means for clustering. I found the option to visualize the data, but I would like something more than that. When you visualize the clusters if you right click on them, then a window appears. In that window there is some information, but I would like to see i.e the data that this point came from. Is there any way through Weka or i should write Java?
I have tried it but with no luck.
If I do not have matlab or R in my machine to plot data, I use GNUPlot ( http://www.gnuplot.info/ ) to plot data from command line and files.
you can use ELKI or Processing Tool as an API in your Java program and can visualize your result. However, the visualization may not be interactive in ELKI but you can certainly extend the interactive property using customized methods while plugging the Processing Tool in your java code.
You may need to write some code on your own but you may not need to start from scratch. You could use Weka's own code (it is open source) to develop a visualization plugin that satisfies your needs. Check the Wiki for more information and examples: https://weka.wikispaces.com/Explorer+visualization+plugins
Sorry if tutorials for this already exist, but the only help I can find is much more advanced than for what I'm trying to accomplish.
I have a 100 element array of integers that I want to export into a spreadsheet. Array[0] goes to A1, Array[2] goes to A2, etc.
I've downloaded JExcelAPI, but I can't follow the tutorials because the tool is for pretty advanced tasks.
try Apache POI... http://poi.apache.org/
i believe this best API for creating microsoft office documents..
(Except MS Visio because you cannot create visio files with this API)
try this....
If you don't want to use OpenXML or jexcel API, which is not as complicated as you are talking about it, consider using a simple .csv file. .csv are easily opened by Excel.
So what you would need is to write your integers to a file like this: 1;2;23;;4;5;5;1; and when it is opened in Excel, you'll get exactly what you need.
I have a set of complex Excel files (with figures in it) that I want to show in a web browser. So I need to convert them into HTML page first. Since the excel files are very complex, I can not just parse them and generate a HTML table with HTML tags. The current manual solution that works fine is when I use Microsoft Excel software to save the spreadsheet as a HTML page. I want to automate this task in some way since I want to do it progrmatically through Java. Is their any existing solution or a way to do it? Thanks.
EDIT - I was able to create a macro for it but could not figure it out that how can I execute a macro on excel file from a Java program. Does somebody know?
If open office does a good job of the export then you could take a look at the source to see how it does it. OO is a combination of Java and C++ I believe so you might get lucky and find a Java solution.
Otherwise, I would try and use Excel itself to do the export and find some way of calling it programmatically. If you go down this path you'd be better of using a Microsoft stack (C# would be the most similar to Java) as I would expect it to have all the functions you need already defined.
You might look into POI:
http://poi.apache.org/
I think your best bet is to call Excel from Java using JACOB
Creating direct COM calls (which is what you'll be doing from JACOB) is a bit tough, but you'll get the hang of it. I can't imagine that the Excel VBA macro is horribly complicated. Take a look at the sample code (Usage and Documentation) in the JACOB link for what this will look like.
One other thing: Remember to explicitly clear references. JACOB will release COM handles when objects are garbage collected, but if you are doing any sort of high performance work, you will want to close those connections as quickly as possible. We generally write all of our COM code in a series of try/finally statements - the code is messy, but robust.
Try using hypernumbers. (Disclaimer, I'm the CEO)
I ended up using the Scribd API. I uploaded the document to their server through their API in realtime and pasted an iframe with a link in it which is returned by Scribd.
Hi I'm looking to parse spreadsheets (xls/ods) in Groovy. I have been using the Roo library for Ruby and was looking to try the same tasks in Groovy, as Java is already installed on a development server I use, and I would like to keep the number of technologies on the server to a simple core few.
I am aware that the ods format is zipped XML, and so can be parsed as such, but I would like to process the file using spreadsheet concepts, not XML concepts.
The ability to process xls files is not of major importance, but would save me having to save multiple xls files to ods (as this is for parsing data from clients).
Thanks
I would suggest Apache POI for access to .xls files.
I've never had to work with the .ods format, so no information on that one.
There's also JExcelAPI, which has a nice, clean, simple interface (for the most part).
Can't help you with ODS Files though.
How about looking at 'odftoolkit' ? http://odftoolkit.openoffice.org/
Groovy in Action has a chapter named "Groovy on Windows" that discusses using Scriptom, a Groovy/COM bridge (using JACOB under the covers), to access several Windows apps including Excel.
For OpenOffice, you can use ODF Toolkit, as Amit pointed out.
I second jdmichal's vote for Apache POI. I have selected it as our library of choose to handle Excel file input (.XLS). The project is also working on the .XLSX file format if you ever decide you want to support that. Based on your specifications, I don't think you want to get into converting things into CSV and it seems like you have established input and output paths. For anyone who hasn't had the joy of dealing with CSV to Excel conversion, it can get a bit dicey. I have spent hours dealing with issues created by Excel converting string data to numeric data. You can see other testimonies to this effect on the POI Case Studies page. Beyond these issues, I simply don't want to personally have to handle these inputs. I'd rather invest the programming effort and streamline the workflow for the future.
I too have not dealt with ODF and have no plans to support it in my current project. You might want to check out the OpenOffice.org ODF Toolkit Project.
Good luck and have fun,
- D.
I suggest you to take a look at SimpleXlsBuilder and SimpleXlsSlurper, both are based on apache POI and can fit your basic needs for reading from and writing to Excel 97 spreadsheets in a concise way.
If your spreadsheets are simple enught - without charts and other embedded contents - you should simply convert the spreadsheet to CSV.
Pros:
Both xls and ods will produce the same CSV - You'll have to handle just one input type.
You won't have to mess with new versions of (Open) Office.
Handling plaintext is always more fun than other obscure formats.
Cons:
One that I can think of - finding a reliable converter from xls and odf to csv. Shouldn't be too hard - OpenOffice has a built in one.
A couple things:
1) I agree that using a CSV format can simplify some of the development work. OpenCSV can help with processing CSV files. There are other good CSV parsers for Java out there. Just remember that anything that's available for Java can be used by Groovy due to Groovy's unparalleled integration with Java.
2) I know you said you wanted to avoid handling XML, but Groovy makes XML processing exceedingly simple.