A standard way that information is encoded for storage in a computer file

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78
votes
20answers
75k views

How to convert between KML and Esri's shapefile (SHP) format?

My users are sending me point data that were digitized using GoogleEarth. How can I convert their KML to a shapefile?
25
votes
5answers
52k 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"?
24
votes
5answers
3k views

What are advantages of using spatialite over shapefile? [on hold]

I found spatialite more useful than shapefiles as it does not have the limitations of shapefile and it is also portable. Many people here use shapefiles to exchange data and even the experts do not ...
19
votes
7answers
2k 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 ...
16
votes
3answers
2k 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 ...
15
votes
1answer
804 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 ...
15
votes
2answers
18k views

Understanding the .asc file

Reading the ESRI help, Supported raster dataset file formats, I read that ASCII Grid file types are addressed with the singular file extension .asc for both 16 bit signed-integer (for discrete data) ...
14
votes
4answers
3k views

Are ArcGIS *.lyr and *.mxd data format specs published?

Are the binary formats of *.lyr and *.mxd files published?
14
votes
5answers
923 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 ...
13
votes
1answer
3k 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 ...
11
votes
3answers
3k 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 ...
11
votes
2answers
5k 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?
10
votes
14answers
9k 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. ...
10
votes
3answers
3k views

Advantage(s) of using underscores in ArcGIS file naming conventions?

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?
9
votes
3answers
6k 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
157 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 ...
8
votes
2answers
2k 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 ...
7
votes
3answers
276 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, ...
7
votes
1answer
2k views

Can QGIS projects be opened in ArcGIS for Desktop?

I am about to start a project with a number of people for a nonprofit organization. I am wanting to create the files in QGIS, but some of the people that I am working with are city officials and might ...
6
votes
4answers
653 views

Is there a universal map/ layer format?

Just wondering if there is a universal map format that all GIS software can read. ie to quickly share layers with all our partner agencies which have different GIS Software, rather than have to ...
5
votes
3answers
2k 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
3answers
855 views

Software for opening .img files

I have some cpc precipitation data stored in IMG format.Could anyone suggest a software beside ERDAS imagine or Arcgis which can be freely downloaded?
5
votes
3answers
2k views

Can we merge shapefiles with different geometries (point and polygon) to get a single layer which shows both geometries?

I want to merge two shape files in which one is of point geometry type and other is polygon type in order to get a single layer containing both points and polygon in a single map.
5
votes
2answers
1k 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 ...
5
votes
2answers
4k 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.
5
votes
3answers
516 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 ...
5
votes
1answer
65 views

Location/format of inserted pictures used for marker symbols in ArcGIS Desktop?

I have an old mxd that uses several hundred custom made picture marker symbols. We don't know where the image files that were inserted as pictures marker symbols are, or what format they were in. We'...
5
votes
0answers
43 views

What's the binary format of ENVI (Classic) ROIs?

I'm a (lonely) Pythonist in an office full of ENVI/IDL users. I've created some tools to help bridge the gap, but one big stumbling block is ENVI Classic .roi files, which my colleagues use a lot. I ...
5
votes
0answers
282 views

How do I parse the file format for attributes in Raster Product Format (RPF) maps and imagery?

I'm trying to implement an open-source NITF reader (using only java, no external libraries such as GDAL or NITRO), and its mostly going OK. However I'm having trouble understanding the RPF extensions, ...
4
votes
5answers
316 views

List of GDAL raster file extensions

I am trying to compile a list of file extensions that are accepted by GDAL, something like ['.tif', '.png', '.jpg', '.jpeg', ...] I found a list of GDAL Raster file formats, but the values in the "...
4
votes
1answer
249 views

When saving a .qgs file in QGIS, another appears. Is this a backup?

When saving a project file (.qgs), which when executed is automatically loaded with qgis.bat, there's another .qgs file which appears in the same directory of the original project file, although this ...
4
votes
2answers
697 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
1answer
257 views

smallest, lossless, GDAL ready image format

I would like to know what the smallest file format is I can use with GDAL that fulfills the following criteria: lossless compression (relatively) easy to read/write with GDAL Python bindings least ...
4
votes
2answers
340 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
87 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 ...
4
votes
1answer
128 views

Comparison of vector file formats

Does anyone know of a chart or table that would explain the benefits / shortcomings of the different vector file formats, eg. .shp, .gml, .kml, .gdb. It seems that ESRI shape is still quite prolific, ...
4
votes
1answer
1k views

How to save geopackage gpkg file with QGIS

I read about the new geopackage file which shall have the potential to be the shapefile of the future. But i can't find a way to save a file in QGIS as gpkg. In ArcGIS it might be possible. I would ...
4
votes
1answer
2k 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 ...
4
votes
1answer
89 views

Can I use .crd and .dwg files as QGIS data sources?

I want to use my autocad files(.dwg) and my field files (.crd), and want to know if they are compatible with qgis.
4
votes
2answers
3k views

How to read this GRIB data [closed]

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
355 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
483 views

Map formats supported by QGIS

May i know whether QGIS supports the following map formats? (1) S-57 Electronic Navigation Charts (Naval Maps) (2) Army/IAF Maps in DGN (3) DTEDO0, DTEDO1 and DTEDO2 (4) GeoTIFF (5) DTED
3
votes
2answers
6k views

How to convert .geotiff --> .tiff?

How to convert .geotiff files to .tiff files (ordinary plain images)? Basically, I have cropped the image to a rectangle of interest and knowing its left-lower location and having chosen the pixel ...
3
votes
2answers
585 views

Can ogr2ogr read .kmz files? How?

Attempting a run-of-the-mill ogr2ogr process with a KMZ file failed: FAILURE: Unable to open datasource `Rail.kmz' with the following drivers. Is there a trick? (Obvious workaround is to unzip the ....
3
votes
3answers
450 views

Which data formats can store Bézier curves?

I've heard that ESRI .gdb can. Are there other databases or file formats that can as well?
3
votes
2answers
306 views

File format (preferably open) for defining web service endpoints for ArcGIS Desktop?

Aside from .LYR files, is there a file format (preferably open) for defining web service endpoints for ArcGIS Desktop? For example, if I publish a WMS feed, can I provide a downloadable resource for ...
3
votes
2answers
163 views

Need a vector format that is editable in QGIS and supports >10 character column names

For reasons, I need to create a new column in a vector shapefile with a name longer than 10 characters, and export to mapinfo TAB format. I know .shp's don't support >10 character column names, so I'...
3
votes
2answers
2k 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
202 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
2k 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!