A standard way that information is encoded for storage in a computer file
48
votes
19answers
33k views
How can I convert between KML and ESRI's shapefile format?
My users are sending me point data that were digitized using GoogleEarth. How can I convert their KML to a shapefile?
15
votes
5answers
607 views
Speed of various raster data formats
I'm having trouble locating any discussion or comparative benchmarking of different raster file formats (e.g., for use in data analysis in R). Does anybody have any insight into why particular formats ...
14
votes
4answers
445 views
Most pervasive GIS formats?
Where can one found out what the most pervasive GIS formats are?
For example, from the GIS file formats Wikipedia page, there 4 broad categories, each with many popular formats.
Raster formats (13 ...
14
votes
3answers
892 views
What is the wire format for Google's new vector map tiles?
Google recently released new vector cartography for their mobile maps. I'm curious if anyone here has any insight into the wire format they use for transmission? I've experimented with a few formats ...
12
votes
3answers
865 views
Are the ESRI .lyr and .mxd data format specs published?
Are the binary formats of .lyr and .mxd files published?
11
votes
1answer
236 views
The next big thing in standardized spatial data exchange format?
I remember reading something a few months back, in the latter half of 2012, about a coordinated group effort to design a new standard for sharing geographic / spatial data. It has or aims to have the ...
9
votes
3answers
1k views
Where can I find country borders data in human-readable format?
I'm trying to obtain some data representing the borders of all countries in the world. This data doesn't have to be very precise, it is to draw the countries on a computer screen. I did a bit of ...
9
votes
2answers
562 views
Grid vs TIF vs IMG
As the title suggests both of the above three formats are raster files. In ArcGIS, apparently there's no difference between them. So what's the difference between these three formats?
9
votes
1answer
506 views
How to access feature classes in file geodatabases with Python and GDAL?
I am trying to access a vector dataset in a ESRI File Geodatabase using Python + GDAL.
I have successfully compiled GDAL with the file geodatabase API. The FileGDB driver is working correctly since ...
8
votes
14answers
4k views
Which GIS support DXF and/or DWG?
Which GIS support DXF and/or DWG (preferably read&write)?
Update: Are there any open source GIS supporting these or similar CAD files?
Support of CAD files generally seems to be problematic. ...
8
votes
2answers
1k views
How can I transform a georeferenced JPG to a georeferenced TIF?
I have an georeferenced JPG file and a JGW file containing the coordinates. How can I transform it to a georeferenced TIF file and a TFW file?
I have tried to save the JPG file as an TIF file in ...
8
votes
2answers
137 views
File naming for Enterprise GIS database?
I'm designing the guidelines for an Enterprise GIS database. Part of this database will include customized geoprocessing tools using a variety of software.
I'm interested in knowing whether anyone ...
7
votes
3answers
665 views
ArcGIS file naming conventions: is there an advantage to using underscores?
In an introductory GIS course, it was insisted that all spaces within file and folder names be replaced with underscores. Why is this taught? Is there a clear benefit of doing so?
7
votes
3answers
217 views
Custom, low-level representation of streets and traffic rules
I'm new to GIS, and I'm still trying to gain an understanding of what can be represented in the various GIS files. Very generally I know(/think) that you can represent points, that lines, polylines, ...
6
votes
2answers
629 views
GDF — Can anyone suggest some good reading?
Can anyone give me a nutshell explanation of the Geographic Data Files format, or post a few URLs I might find enlightening?
I get the sense (although I'm not sure) that GDF implies building ...
5
votes
3answers
98 views
What is a simple binary raster storage format which ArcGIS can read?
I have a C++ program that manipulates raster digital elevation models.
I have been using ArcGrid ASCII format for results. It is simple to code and gets the job done, but it necessitates a decimal ...
5
votes
2answers
626 views
60GB .gdbtable file in my file geodatabase – what is it, and can I delete or make smaller?
The title says it all really – I have a single file named 'a0000000.gdbtable’ in my default file geodatabase that is 60 GB in size. I have a number of other files with .gdbtable extension that aren't ...
4
votes
3answers
258 views
In what data format should I export a (lat,long,alt) or (x,y,z) grid to be compatible with the largest number of GIS software?
I am new to GIS and developing an application that generates a 3D grid with (latitude, longitude, elevation) or (x, y, z) metric triplets, and I would like to add an exporting feature that ensures ...
4
votes
2answers
280 views
What generation of the MrSID format is supported by ArcGIS 9.3?
This is probably old news to some, but I just learned that MrSID (.sid) files have different 'generations' of file formats - so there are MrSID Generation 2, Generation 3, and Generation 4 files. ...
4
votes
2answers
130 views
What format is this data in?
I ran into a file today that is in a format I'm unfamiliar with, and I'm hoping that someone can identify it.
The file extension is CTZ, but the only file type I found on Google with that extension ...
4
votes
2answers
812 views
How to read this GRIB data
on this open FTP server (ftp://ftpdatos.aemet.es/modelos_numericos/hirlam005_peninsula/) you can find HIRLAM models from the Spanish meteorological service.
The documentation in the LEEME files (in ...
3
votes
3answers
76 views
E00 file structure?
I am trying to write a java application that reads and visualizes data from E00 file.
I cannot find any sources describing what is the structure of an E00 file and also what information does it ...
3
votes
2answers
389 views
IDRISI .vec file translator to ESRI shapefile format?
I've recently got hold of almost 20 years old IDRISI .vec files which I'd like to convert to ESRI shapefile. I've been struggling to find any translator for this file format so far. Does anybody know ...
3
votes
1answer
84 views
rgb2pct.py increases size of file 20 fold!
I wanted to reduce the number of bands of a tif file from 3 to 1...
I used this command
rgb2pct.py -n 256 fnp_braunschweig.tif fnp_bs.tif
and it increased the size from 31mb to 778mb
I actually ...
3
votes
3answers
500 views
Convert .dwg file into .dwf file using Teigha tool
I am using teigha tool to convert my dwg file into dwf file. Can anybody help to explain the procudure for the same.
Your prompt reply will be greatly appreciated!
3
votes
2answers
44 views
How to store and edit data with a defined topology using open software and formats?
I'm looking for a way to store and edit spatial data that preserves topological information.
In my concrete application, I need to represent triangular meshes, which consist of unique nodes and ...
3
votes
2answers
780 views
Change output file type in QGIS georeferencer?
I have successfully georeferenced a raster file via the Georeferencer plugin (Georeferencer GDAL Version 3.1.9) in QGIS 1.7.0.
However, I noticed that the output georeferenced raster file is in TIFF ...
3
votes
2answers
103 views
ENVI BIL file algorithm logic
I have a 6 band Landsat image, RGB and 3 NIF bands. As far as the Band Interleaved by Line (BIL) method goes, the resulting image should have, and I quote ENVI manual:
the first line of the first ...
3
votes
1answer
187 views
ArcGIS Desktop - Web Services Definitions
Aside from .LYR files, is there a file format (preferably open) for defining web service endpoints for Arc products?
For example, if I publish a WMS feed, can I provide a downloadable resource for ...
3
votes
0answers
27 views
Library for parsing scientific PDS files?
Does a library exist for parsing the PDS files that scientific planetary data gets shipped as?
For example, here's a link to to the lunar topographic data from the Lunar Reconnaisance spacecraft ...
3
votes
0answers
90 views
How to view Esri GRID format file in wxpython file browse window? [closed]
I'm trying to browse for all kinds of vector and raster data using a filebrowsebutton.
The problem is I don't know how to let the browse window see the Esri GRID files (which contains a folder and a ...
3
votes
0answers
163 views
GFS SIG/SFC file format of siganl.gdas/sfcanl.gdas analyzing/decoding problem
I am creating a database from datafiles. I encountered many fails and errors, which I have already fixed (also with the help of this Q&A web). Now I am stucked a bit in decoding of 6 files because ...
2
votes
3answers
421 views
Can I convert a kmz file to kml?
I have a kmz file. Is there an easy way to convert it to KML? Can I just "unzip"?
2
votes
2answers
2k views
How can I export county level data in a .shp file to a text (csv) file in ArcMap?
I have a shape file created as per the answer to my previous question, which includes county level means for each county in the US.
How can I now export this data in a .csv file, e.g. with just the ...
2
votes
2answers
46 views
Raster format to read with python
I currently have a DEM raster stored in an ESRI geodatabase. I've been asked to create a purely python (e.g., no arcpy functions) program that works with the values. Therefore, I need to convert the ...
2
votes
1answer
95 views
Can you explain this WKT multipolygon format?
I am confused by the output I'm getting from ogr2ogr when converting a shapefile to WKT. What I'm expecting to see is something in the form below (from Wikipedia):
MULTIPOLYGON (((40 40, 20 45, 45 ...
2
votes
1answer
21 views
How to open the Electronic nautical chart S-57 data?
Anyone know how to open the Electronic nautical chart S-57 data by using GIS software e.g. Arcview, QGIS? and converted it to general GIS / CAD formats. Thanks.
2
votes
1answer
92 views
Error while trying to upload a .bsq file to the geoserver
I am trying to upload a .bsq file (ENVIHdr Coverage Format) to the geoserver. While doing this I got an error message. I am using the "GDAL" Extension for the geoserver. The error message is: "Could ...
1
vote
2answers
1k views
Converting TAB to MIF / MIF to TAB
How I can export (import) data from TAB format to MIF and vice versa?
1
vote
2answers
194 views
How do I batch export maps for sub regions of a dataset with qgis?
I have a national level dataset consisting of polygons, polylines, points and rasters. I would like to export a map for every sub region (border defined by a polygon shapefile). Is there a simple way ...
1
vote
2answers
826 views
Import .cdr file into gis/cad format
I have a corel draw (.cdr) file that I would like to import into a GIS. It is a vector format which I thing has no geographic information associated. I would like to be able to get it into MapInfo ...
1
vote
1answer
270 views
KML to Dat Converter?
Are there any free KML to DAT(destinator compatible) converter available ? I tried to use global mapper but was in vain. Also used ITN converter but the line was converted to points.
1
vote
1answer
340 views
Is there any open source library for reading OCAD files?
I would like to read map files created by OCAD (.ocd). The file format specification is open and available on the web page, but it's binary and complex.
Is there an open source library that can be ...
1
vote
0answers
56 views
retrieve some info from GRIB2 file with JAVA
I've just started parsing some info inside GRIB2 file with NOAA weather forecast, and I am realizing this task is not as easy as I could think 'a priori'. I need to process some info inside JAVA ...
1
vote
0answers
84 views
'File is too big' error when uploading QGIS Plugin
I have written a simple QGIS plugin which zooms the map canvas to a user specified UK postcode. I would like to share the plugin but the csv file, which contains stripped down OS Code-Point open data ...
1
vote
0answers
26 views
Suggestions for vector format for polygons
I am using two polygon tables in postgis (A and B ).
I need to make a vector file that incorporates information of the overlapped polygons B intersecting each polygon on (A).
I can make a single ...
1
vote
3answers
96 views
Looking for a website to produce a file using UTM or LL or LL to UTM or general
Is there a website that allow me to upload my GPS file from UTM to lat and long to produce a new output file ? I am looking for one to run a batch a list of UTM or LL to converstion them in either ...
0
votes
1answer
53 views
multispectral images (Band Sequential format)
How can I create a multispectral image file (in band sequential (BSQ) format), from several 1-band images, using GDAL libraries? I work with C++ language. Thanks for your attention.
0
votes
1answer
117 views
How to read/write a/from a file in javascript with prototype.js/jQuery.twFile support OR anyotherway
I want to write my data into a file from OpenLayers, I have gone through Prototype.js and jQuery.twFile.js or anyother way to write into a file.
0
votes
1answer
987 views
How to open or import .sdc files in QGIS?
I have some .SDC files i want to look at but i dont have arcview installed. is it possible?
i couldnt even find a software that does sdc to shp conversion.
any idea?
i am using qgis 1.7.4 on both ...
