A reference framework consisting of a set of points, lines, and/or surfaces, and a set of rules, used to define the positions of points in space in either two or three dimensions.

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6
votes
2answers
672 views

Getting the projection of a LAS file using liblas?

I am using the python api of liblas to read/write las files. I would like to get the spatial reference information of the las file using liblas, but have been unable to figure it out. Can anyone ...
3
votes
1answer
3k views

Add MicroStation dgn to ArcGIS/ArcCatalog 10.1

I'm an iOS programmer but new to using ArcGIS 10.1. I'm having a problem loading my MicroStation dgn file to ArcCatalog. I've connected the folder containing my MicroStation V8i roadway design dgn to ...
1
vote
1answer
20 views

Export entire Mosaic with “Equal-Arc” spatial reference

I have several mosaic datasets contain a total of about 1000 images, each about 500mb in size. Unfortunately our customer needs a file format different than the one we are using and needs the imagery ...
173
votes
11answers
59k views
1
vote
0answers
45 views

Change coordinate system to add buffer in meters

I have am trying to add functionality to allow users to find points that are within a buffer distance inside or outside the parameter of a polygon. The map is in IProjectedCoordinateSystem so to my ...
45
votes
4answers
178k views

Does Y mean latitude and X mean longitude in every GIS software?

Now it's been 3 days I am using Mapinfo and it has Y as latitude and X as longitude. Is that the same case for all mapping software? As for any country their respective value is multiple of 1 or -1. ...
0
votes
0answers
10 views

Importance of CRS in Getis-Ord Gi* hotspot analysis

I have a question about the importance of the chosen CRS in a Getis-Ord Gi* hotspot analysis - I am running a hotspot analysis (using Zone of Indifference spatial relationship) on a quite restricted ...
3
votes
2answers
25 views

Error to obtain coordinate reference system argument from a raster image in R

I got an error when i wanted to obtain the CRS from stacklayer. I don´t know what could it be. I need some advice or help to obtain it. This is my code. #LOAD RASTER LIBRARY >library(rgdal) ...
0
votes
0answers
23 views

Shapefile analysis with ArcGIS10.1 [on hold]

I am using ArcGIS 10.1 for Desktop and I am struggling to make a shapefile with a map. I made the shapefile but I could not include a map with longitude and latitude. I have data about tuberculosis ...
0
votes
1answer
259 views

GeoTools, convert CRS for Google Maps

I'm trying to use GeoTools to convert coordinates from EPSG:3857 to various CRS, in order to display WMS layers on a Google Map. For example, I want to display a layer in the EPSG:4326 CRS. I have ...
1
vote
0answers
19 views

Which SQL Server spatial data type to use for UK data in SQL Server?

Which spatial data type should be used for UK data in SQL Server?, i.e. GEOMETRY or GEOGRAPHY? I'm aware of OS National Grid and my understanding is it's an X/Y coordinate system, covering from ...
1
vote
1answer
27 views

In Layer spatial reference system units

Can I edit the in layer spatial reference system units? I have 2 shape files, they have the same CRS but they have different in layer spatial reference units? I'm new to QGIS and I don't really know ...
3
votes
4answers
3k views

Convert from WGS84 to GDA94/MGA94 on iOS

I have a mobile app (iPhone/iPad) for recording data and taking notes, including photographs, and a government client needs GPS coordinates attached to each photo. They require coordinates in the ...
6
votes
1answer
127 views

What is my coordinate system preserving?

I'm trying to get a better grasp of coordinate systems, datums, projections etc. I understand that certain systems preserve different things; distance, shape, angles, area. I'm wondering how you can ...
2
votes
1answer
16 views

Can reference system in Leaflet be changed without disrupting data position?

I have a leaflet map that uses default CRS (EPSG3857) with multiple markers placed on it. Their LatLng are read from JSON file. I want to change map CRS to Simple, keeping markers on exact same screen ...
1
vote
0answers
16 views

Raster from Ascii text file doesn't project properly

I created an ascii grid of annual precipitation for CONUS in MATLAB and imported it into Arcmap. The text file can be downloaded here: https://www.dropbox.com/s/0k4x257x597ogij/meanTotalPmm.txt?dl=0 ...
1
vote
0answers
45 views

Delete CRS in QGIS

Is there a way of deleting the various CRS's that QGIS lists? We are a Local Authority in England and the only CRS we need is British National Grid, which is set as the default, as well as Lat/Long ...
3
votes
1answer
34 views

Which CRS would be the most appropriate to georeference a map of Egypt?

I'm trying to georeference a geological map of Egypt from 1981, but I don't know which CRS to chose, either the transformation type nor the resampling method... And once the georeferencing of the map ...
0
votes
0answers
15 views

Converting raster data from netcdf to image

I'm rasterizing some wind data from oos.soest.hawaii.edu/erddap/griddap/NCEP_Global_Best to use as an overlay of a final image, but I'm having issues calculating the bounding box of the final image. ...
2
votes
1answer
29 views

Assigning CRS using las2las from libLAS?

My las file had a spatial reference of "None." I tried to assign the CRS (in which data were collected) with the following command line: las2las flightline_002.las --a_srs EPSG:32632 lasinfo ...
1
vote
0answers
22 views

Custom ArcMap 10.3 Projections?

I'm still pretty new to GIS, being a new EIT at a civil engineering firm. Im here to find out if ArcMap has this certain projection. If so, how do I access it? In ArcMap the projection currently says ...
0
votes
0answers
23 views

Algorithm for converting from projected coordinate system to geographic one using Helmert transformation

I have a data in projected coordinates system and I need to convert them to WGS84. I know the parameters of position vector transformation and I know the projection details of my projected coordinate ...
3
votes
2answers
464 views

Different definition of EPSG:3857 in GeoTools and QGIS

I want to do some checking if my point lies in any of the polygons defined in shapefile. So, I thought that I will determine CRS from shapefile (created in QGIS), and use it for transformation (where ...
2
votes
1answer
25 views

Determining CRS from ASCII file?

It is possible to know the CRS from an ascii file? The information I have about it in the heading of the ascii file is the x and y corners: xllcorner -10,000416206603 yllcorner ...
5
votes
2answers
176 views

Since ArcMap Projects data “on the fly” why aren't these data sets aligning?

I have a polygon feature class in NAD_1983_UTM_Zone_13N (Green in map). I projected it to NAD_1927_StatePlane_New_Mexico_East_FIPS_3001 (Pink in map). Why are these not aligning? Does this mean the ...
2
votes
2answers
2k views

WFS: How to specify input coordinate reference system

Geeoserver allows to specify output CRS by parameter srsName in WFS GetFeature. Is there a way to specify the input CRS? I am displaying layers of different CRSs in my map - all reprojected to ...
3
votes
1answer
74 views

Same crs, different spatial reference system units, shape files / QGIS

I have two files, same crs but different reference system units and different scale. Long story short, the shp files won't overlap :( I've read some answers to what seems to be the same problem but I ...
1
vote
0answers
54 views

projected coordinate system and transformation

I'm a beginner with GIS and I'm currently working on ArcGIS 10.3. I have two distinct shapfiles : one within the projected coordinate system "NTF_Paris_Lambert_Sud_France" and the second one within ...
0
votes
1answer
217 views

Projection error, geotransform not valid

I am trying to extract data from gridded weather datasets such as GLDAS from pixels in which weather stations are located. I created an ArcGIS shapefile of weather station points. These ...
4
votes
1answer
44 views

Converting from one Transverse Mercator based system to another produces inconsistencies

As a civil engineer, the one semester of survey training we had leaves my knowledge quite lacking in the field of coordinate systems. We're working on a project based in Gabon and we get information ...
2
votes
1answer
16 views

How to set coordinate system for deed calls in COGO?

I am working with deeds that display metes and bounds, but the surveyor did not include the coordinate system used. If I am trying to enter this data into Arcmap using COGO, where in the process of ...
0
votes
1answer
191 views

How to get projection data (.prj) of raster image using GDAL/OGR?

I start with a boundary shape-file (think U.S. states) in lat/long that I convert to some projection, and then rasterize the result as a .tif. What I need now are the raster coordinates of the ...
1
vote
1answer
467 views

Query all Object within n kilometer Radius with Hibernate Spatial?

I use hibernate spatial attach a geolocation to a car. My card domain class looks like this: import com.vividsolutions.jts.geom.Point class Card { String name Point location } My program is ...
-1
votes
0answers
15 views

“Output Dataset or feature Class: <empty>” when using project tool in ArcGIS

When using the Project tool in ArcGIS, an error message reads "Output Dataset or feature Class: empty" even though I feel I have defined this. The issue may however, be an 'invalid extent for output ...
1
vote
2answers
36 views

Coordinate System Mismatch

I understand that coordinate system mismatches between layers is a relatively common problem. Nevertheless, exploring other posts hasn't helped me understand my issue. In short, I have a DEM raster ...
3
votes
1answer
329 views

How do I figure out the length of polyline features in a feature class with a WGS 1984 coordinate system?

I'm trying to figure out lengths of polyline features in a feature class with a WGS 1984 coordinate system. Here's code to list lengths: >>> import arcpy >>> inFc = ...
1
vote
2answers
203 views

Defining coordinate reference system with rotation in GeoServer?

I am using GeoServer and have a layer in EPSG:900913 ("Google Mercator"). I need to "rotate" the map around certain point (say, 1500000, 7000000) by certain degree (say, 30 degrees clockwise). How ...
3
votes
2answers
48 views

Understanding UTM coordinate syntax in Zambia?

I have some geo data from a collaborator with coordinates that look like this: Grid UTM X UTM Y 30C10 696033 8967310 25C05 690997 8962938 25C05 690688 8962268 sometimes lower case ...
1
vote
2answers
666 views

ogr: how to use epsg database for RD New projection?

I'm trying to assign this EPSG projection to my newly created shapefiles using ogr. The OGR Projections Tutorial says: ...any geographic coordinate system in the EPSG database can be set by it's ...
2
votes
1answer
36 views

Converting NAD 83 State Plane Maryland Feet Coordinates from lat/long and vice versa using QGIS?

I need to convert a list of lat/lon points (in.csv file) into NAD 83 State Plane Maryland Feet and vice versa. I know it can be done using ArcGIS, but I only have QGIS. I am also quite new to ...
2
votes
1answer
28 views

Create a layer in PyQgis with the same CRS as another

I want to create a layer which use the same CRS as another layer I already have in the project. The idea is to avoid the CRS dialog. I tried the things in this link: How to define layer's CRS and ...
3
votes
2answers
82 views

What kind of projection is this?

Can someone tell me what the projection is in this zone map from NOAA? I am trying to replicate it (or get close) in QGIS.
0
votes
0answers
20 views

How to define the Northern Lambert Conformal Conic CRS?

The dataset I got my hands on uses the the Northern Lambert Conformal Conic CRS? I was not able to find a ESPG number using http://prj2epsg.org/search so I decided to define a custom CRS in R but I ...
2
votes
0answers
43 views

Converting KML coordinates to Leaflet

I am trying to convert a Google Map KML file to a csv, to map the longitude and latitude points on Leaflet. But the coordinates keep mis-projecting and some end up off the land mass. The steps I have ...
-1
votes
1answer
41 views

Calculation of coordinates

How can I merge some small regions to create big regions? Then how would I be able to calculate the coordinates of these new regions?
-1
votes
0answers
43 views

Warning, inconsistent extent!

I have a raster that was provided to me from another institution that plans to provide this data (and many more layers) from a thredds server for download to the public. Correct me if I'm wrong; my ...
1
vote
0answers
18 views

SRIDs do not match for the two geometries in oracle spatial

I am trying to resolve where some points from Point Geometry lying outside the Polygon geometry. I want to filter those points which are lying outside the polygon geometry. I am getting error where ...
1
vote
1answer
38 views

QGIS Lat/Long Postcodes Coordinates Being Placed Out At Sea?

I've read plenty of posts on this site regarding coordinate systems but none of them have helped solve this issue. I'm using Ordinance Survey Lat/Long coordinates for postcodes but a small number are ...
1
vote
1answer
42 views

Conversion of projection

I have received a drawing with a type of projection system which I do not recognize. The drawing says that it's LO 19/WGS 84. I would like to convert this to decimal degrees to be able to plot the ...
5
votes
2answers
992 views

How to properly open an ASTER data?

Yesterday i downloaded an Aster L1B image from USGS's website. If i load it in QGIS, it doesn't get displayed properly(location wise). Even after i've enabled "On the fly" option, it's not reading the ...