Questions tagged [convert]

"Convert" usually tags questions where a change of physical file format or of coordinate representation is needed.

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10
votes
4answers
9k views

Transforming from DWG/DXF to GIS?

I've got tons of DWG/DXF files with information (in several layers) dealing with: Contour lines and elevation (lines) positions of antennas (points) protection areas (polygons) administrative ...
16
votes
9answers
38k views

Converting XYZ files (with regularly spaced xy) to ESRI GRID format?

Normally consultants (LiDAR survey) provide me with data to my specifications; already in ESRI GRID or ASCII GRID format. This way LiDAR data can be easily used with ArcGIS. This time I only have xyz ...
8
votes
1answer
566 views

How to transform a set of street-segments into city-blocks, with PostGIS2?

Theoretically is possible to obtain the polygons of city blocks (urban blocks) from streets, when streets are represented by street axis (LineStrings). The urban blocks are bounded by streets, so ...
6
votes
3answers
6k views

Date-format conversion

I'm using Time Manager and QGIS 1.8.0 and I am stuck at date-format conversion. Time Manager needs Gregorian format YYYY-MM-DD HH:MM:SS.ssssss in text field and I have thousands of records in "month/...
8
votes
1answer
10k views

Understanding the format: WKB from WKT and how to convert the first into the latter [closed]

I don't understand which kind of format I have my data. The column name is wkb_geom, so I supposed that data were in WKB format, but then I was checking around and I couldn't find example of it. Data ...
7
votes
2answers
39k views

Convert X,Y State Plane coordinates to decimal degrees

I have 1000's of data point I need to convert from North Central Texas 4202 into Lat/Long decimal degrees. Can someone give me a conversion equation so I can quickly convert using excel? I have only ...
3
votes
2answers
2k views

GTA V coordinates to LatLng

I'm here because I'm trying to create a GTA V map with Leafletjs API. In deed, I've got my tiles that are ready. But the aim is to put markers on the map by using GTA V in-game coordinates. To achieve ...
3
votes
1answer
1k views

Appropriate pixel size when converting vector to raster

I am converting vector polygons into raster datasets. Is there a standard calculation for converting the scale of the vector into an appropriate pixel size (e.g. 25 metres)? My vector has been ...
12
votes
2answers
22k views

How to convert a shapefile to WKT?

I'm trying to convert a shapefile into the simple Well Known Text (WKT) format in the example below (from http://en.wikipedia.org/wiki/Well-known_text). MULTIPOLYGON (((40 40, 20 45, 45 30, 40 40)), (...
9
votes
1answer
15k views

Batch converting Garmin GDB to GPX?

I need to convert a lot of garmin GDB files to GPX in order to convert it to another vector format. Is there any tools available can do a batch convert from garmin GDB files to GPX? Using MapSource ...
8
votes
2answers
3k views

Converting Visio diagram to GIS layer for ArcGIS Desktop?

I have a office floorplan that is a standard Visio drawing file (*.VSD) that I would like to convert into a GIS feature class (shapefile, GDB, PostGIS, or any other applicable format, it doesn't ...
4
votes
1answer
15k views

Converting WMS to SHP?

I'm looking for tool that will be convert WMS to vector layer. Are they ready tool?(for example in python)
12
votes
4answers
3k views

Combining corner-touching polygons into a single feature

I have created a polygon layer from rasters, and only have a single classification ID (and calculated acres) for each polygon. I would like to "dissolve" all touching features into larger, individual ...
11
votes
4answers
11k views

Character encoding support in geodatabases and shapefiles

I've got several geodatabases that include feature classes with Greek letters in a lot of the attributes. When I try exporting a feature class as a shapefile from ArcCatalog, the attributes are ...
9
votes
2answers
6k views

How to convert GDB data to shapefiles without ArcGIS?

We've got some data (supposedly it's a simple collection of points--or at least that is all we need to extract) from a 3rd party in a GDB folder (I don't know how to tell what version) but we don't ...
7
votes
1answer
27k views

Convert String to Integer in QGIS tables

I want it to know how to convert string field values to integer values in QGIS Dufour... there are numbers and strings in the same field, when I use toreal(string) it stops and it won´t create the ...
7
votes
3answers
3k views

Vertical Datum Conversion Utilities

I have some data (points and rasters) that I would like to be able to convert to and from several vertical datums, including MLLW in coastal Florida. I would appreciate it if people could provide some ...
5
votes
2answers
2k views

Converting TIFF file to LAS file in QGIS?

I've been asked by a client to compile LiDAR files (currently in GeoTiff format) into a LAS dataset. Is this possible within QGIS? I have downloaded LAStools, but I'm still fairly new to LiDAR so ...
4
votes
1answer
5k views

Shapefile to MSSQL with ogr2ogr fails to make connection

I am using ogr2ogr from OSGeo4W on my Windows 7 box to import a shapefile into a SQL Server database on one of my servers. I was able to successfully complete the conversion using shp2sqlserver, but I ...
4
votes
2answers
1k views

Converting 4-band TIF to PNG while keeping all 4 bands?

I have a number of aerial photos containing both RGB and a near-infrared band. The images are in TIF-format, however I need to convert them to PNG without losing any of the bands. I have tried ...
3
votes
2answers
672 views

Extract PostGIS line features to GPX

I have a request to provide GPX files of certain trails (around 100) that are present in OpenStreetMap. Given a local PostGIS install with OSM data, I think the process would be something like: ...
3
votes
5answers
18k views

Opening ArcGIS Desktop layer package (.lpk) file using QGIS on Mac?

I downloaded an LPK file from the ESRI site that contains USPS defined zip codes. Because I'm working with QGIS on a Mac, I converted the file to a .zip. There's a .lyr file that opened up in the zip, ...
3
votes
2answers
2k views

How to read MapInfo .tab files in ArcPy?

I want to use arcpy (the ESRI install of python 2.65) to analyse MapInfo TAB files...can this be done directly or do I need to convert them to shp files...if so would it be possible to do something ...
3
votes
1answer
3k views

Creating DEM from vector contours using GRASS and R?

I want to convert vector contours to a DEM. From other posts, I wanted to use the Grass r.surf.contours tool. Initially, I converted the vector contour layer to a rasterized contours using the ...
2
votes
3answers
6k views

Convert vector points to GPS waypoints and route

I have a shapefile with a series of points (around 300) using British National Grid. I need to put them on my Garmin Etrex 10 as waypoints. Can someone tell me how to convert this shapefile into ...
2
votes
1answer
5k views

Converting (geodetic pose + cartesian offset) to geodetic position? [closed]

I am in search of an algorithm to solve the first/direct geodetic problem precisely in 3D. The input is: a geodetic (not geocentric) position (WGS84, height is above the WGS84 reference ellipsoid) ...
0
votes
1answer
1k views

How do I convert coordinates to raster (bsq, bil) lookup?

I have a .bil file, which has interleave = bsq in the hdr file. I'm having trouble finding any insight into how I would essentially do a lookup on the file. I have no problem reading a specific ...
11
votes
10answers
17k views

Batch convert lat longs to UTM?

I've got a .csv file that contains a long list of latitude and longitude points. Is there an efficient way to batch convert the list into a projected UTM coordinate system?
9
votes
4answers
11k views

Features to 3D from 2D in QGIS

Is there a way to convert 2D features to "3D" features in QGIS? I know there is a way to do this in ArcMap by using an attribute value in the attribute table, but I am looking to do this with ...
8
votes
1answer
20k views

How to Convert labels to DWG Cad file?

I have a new task where the client is asking for a .dwg file of layer labels. My first thought would be to create an annotation of the labels and then try and use the Export to CAD tool in ArcMap. ...
6
votes
4answers
11k views

How to convert SHP to GPX or to JSON?

I would like to convert the tree inventory shape files of London (Canada) into a GPX file and if possible into a JSON file. You can download the archive from their Open Data website. It contains the ...
5
votes
1answer
1k views

Formatting OGR VRT file to convert CSV to KML?

I am attempting to get a nice KML for simple review of POI/geocoding from a CSV. I a using ogr2ogr and a VRT. You can see the VRT file below, with two attempts to get this right. Basically, the issue ...
4
votes
1answer
918 views

Converting elevations into correct units with pyproj?

I am converting a point from wgs84 into a state plane coord system (epsg: 32051, which is defined in US survey feet) using pyproj, but the transform isn't changing the z values into feet: point_4326 =...
4
votes
1answer
14k views

Creating shapefile from Excel file in QGIS?

I am using QGIS 2.6.1 and have worked in an Excel file database (which was actually converted from a Shapefile). I have managed to convert it as CSV file and load it into QGIS (displays data fine) but ...
4
votes
6answers
6k views

How do I make a SHP file from waypoints?

I have a Garmin etrex 20 and I want to convert my waypoints into a shapefile for QGIS. The waypoints need their name and background information with them in the shapefile.
3
votes
3answers
4k views

Plot Canadian (Alberta Province) township, range, and section data on Google Maps

We are working on a project where we need to plot some part of Canada (Alberta) over Google Maps. We can plot maps on Google with coordinates (lat/long) or geometry values. But our client provided us ...
3
votes
3answers
1k views

Can ArcGIS Desktop create LAS (or lasd) files from ASCII data?

I have many ASCII files containing LiDAR xyz values. In order to create an ArcGIS LASD file, I need to convert these ASCII files into las files. I can do this with FME or LAStools, but I can't see a ...
3
votes
1answer
345 views

SVY and QDC files from Quickdraw Contours in QGIS

I am trying to view data collected from a Garmin sonar unit in QGIS. The data on the Fishfinder shows or creates the contours but I can't seem to find a way to convert it to a format that QGIS can "...
3
votes
1answer
4k views

Python GDAL: degrees to meters without reprojecting

I am trying to get senseful results in my Python script. I want to measure distance between features in a shapefile. I'm working with the SRS: GCS_WGS_1984, so my units are in degrees. But for the ...
2
votes
1answer
5k views

How can I export elevations from AutoCAD in a format that ArcMap can read?

I have elevations in Autocad, I can shift between a triangles, contours etc if it makes any difference. How can I export these into something I can use in Arcmap? I have tried the Make shape function ...
2
votes
1answer
336 views

Converting time field omitting time and returning null values?

I have a time field in my shapefile that is formatted as HH:mm:ss.s It is a text field, and I want to convert it to a date so I can calculate time elapsed across rows (if there's a better way to do ...
2
votes
2answers
3k views

Converting .las to .pcd file using PDAL?

Is it possible to translate .las files to .pcd with PDAL? If so, using which tool? I need an example about how to set the command-line with such tool. If it is not possible (or alternatively), is ...
2
votes
1answer
173 views

Conversion of coordinates of “Bochum coordinate system”

I need to convert historic coordinate data into more recent Gauß-Krueger data. Specifically, I need to convert "Bochum coordinates" used till 1960 in the local coal mines into DHDN/Gauß-Krüger zone 2 (...
1
vote
2answers
3k views

How to find the proper coordinate reference system with two sets of data using different measurements or too convert one system into another

I have two different entries of data in two different spread sheets. One of the spread sheets uses a coordinate reference system that I have no idea what the units of measurement are. the properties ...
1
vote
2answers
6k views

Exporting coordinates from LAS files to CSV?

Is there any tool available for extracting the X, Y and Z coordinates from a .las file and exporting them to a .csv or similar file?
0
votes
1answer
464 views

Converting tif to format for TIMESAT using BEAM VISAT or ERDAS IMAGINE?

How can I convert tif image into a format for TIMESAT software to create a time series? I am using BEAM VISAT or ERDAS IMAGINE program.
0
votes
1answer
1k views

Converting shapefiles to CAD files? [closed]

I'm having difficulty in converting shapefiles to cad file. I'm currently using the ArcGIS 9.3.1 version and I tried to convert it using the toolbox> conversion tool> to cad> export to cad ...
60
votes
4answers
125k views

Getting coordinates from geometry in PostGIS?

This line: SELECT geom FROM myLayer.geom will return a hex value. How would I get decimal values, which is a human-readable coordination?
24
votes
5answers
4k views

Alternatives to ogr2ogr for loading large GeoJson file(s) to PostGIS

I have a 7GB GeoJson file that I would like to load into a PostGIS database. I have tried using ogr2ogr but it fails because the file is too big for ogr2ogr to load into memory and then process. ...
9
votes
2answers
3k views

Automating batch load of multiple GPX files into PostGIS?

I've got 50+ GPX files that I would like to "batch load" into a PostGIS database. All of the track_points data would be loaded into a "track_points" table (with typical GPS fields like lat, long, ...