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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16 views

Map Projections - WHAT? [on hold]

I have a problem (C#.NET): What I have: Points with a coordinate (Lan & Lon) A canvas (WPF) with a dynamic size A control which represents a point A zoom factor, the kilometres from right to ...
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0answers
11 views

Two layers of the same region with the same coordinate system does not lay in the same place! [duplicate]

I know that my problem seems to be frequent but I couldn't find any good till answer. I have two layers for the same place (area and roads) in my ArcGIS, both of them has the same coordinate system ...
1
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1answer
22 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 ...
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0answers
11 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 ...
2
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0answers
47 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 ...
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0answers
23 views

Shapefile analysis with ArcGIS10.1 [closed]

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 ...
1
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0answers
20 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 ...
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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
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2answers
29 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) ...
2
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1answer
17 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 ...
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0answers
17 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 ...
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0answers
46 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 ...
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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. ...
3
votes
1answer
36 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 ...
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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 ...
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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 ...
2
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1answer
30 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 ...
2
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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
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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 ...
3
votes
1answer
75 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 ...
6
votes
1answer
136 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
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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 ...
4
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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 ...
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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 ...
3
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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 ...
2
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1answer
29 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 ...
2
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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 ...
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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
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0answers
44 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
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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?
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0answers
44 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 ...
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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
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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
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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 ...
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0answers
24 views

Get Coordinates

I have the following tif metada: Geotiff_Information: Version: 1 Key_Revision: 1.0 Tagged_Information: ModelTiepointTag (2,3): ...
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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
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1answer
63 views

How to convert from a local coordinate system to UTM (and vice versa) using mathematical expression

I have two coordinate systems- UTM Zone 23S and a local one with the following conversion from UTM to Local: EASTING: SQRT( (UTM_EAST-296787.355)^2 +UTM_NORTH-8095123.271)^2) ...
2
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0answers
34 views

Creating Proj4 string for local coordinates

I am fairly new to coordinate system conversion, so am rather lost on the following problem. We have been using Proj4 to convert between various coordinate systems which is fine for known coordinate ...
1
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1answer
22 views

R: Krovak projection in R - identical in ArcGIS, different in R?

I have two files: shapefile and raster, both in the same coordinate system in ArcGIS: EPSG 5514. Check information on projection in ArcGIS for raster: S-JTSK_Krovak_East_North WKID: 5514 Authority: ...
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0answers
6 views

How do I display NAD 1927 Albers with other data?

I have some raster datasets which are in NAD 1927 Albers projection. I cannot seem to display any other type of data with this projection. I get the pop-up projection warning when trying to add a ...
2
votes
1answer
21 views

Trying to import Tiff files created in arc9.3 into 10.2, not working

I'm trying to use the scanned maps available here: http://www.env.gov.bc.ca/esd/distdata/ecosystems/TEI_Scanned_Maps/B01/B01-4700/ I save all 6 files in a folder, open ArcGIS 10.2 and try to add to ...
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0answers
20 views

Get geographical coordinates from these ones

Can't seem to able to identify what type of coordinates do these belong to: 9610346,87 E 5235025,08 N They seem like cartesian coordinates, but online converter converts them like this: ...
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0answers
13 views

How can I change the name of a coordinate system in SAFE FME?

Every time I use SAFE FME to write data in the coordinate system EPSG:25832 FME names it NUTM32. I them have problems reading the data in ArcGIS Desktop because it doesn´t recognise the name NUTM32. ...
0
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0answers
29 views

Shape File CRS Conundrum

In QGIS I have 2 Shape vector layer files which should overlay approximately one on the other. They have both been downloaded from the same government website (data.vic.gov.au) with the same ...
5
votes
1answer
94 views

Krovak projection EPSG 5514: Correct data transfer between R and ArcGIS?

I have a problem which many ArcGIS, QGIS and R users from Czech Republic and Slovakia may encounter. In ArcGIS, I am working EPSG: 5514, Projected Coordinate System, defined as: ...
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0answers
22 views

Extracting projection details for TAB files from multiple folders using arcpy's describe spatial reference?

I am trying to extract projection details of vector files (it might be a tab or shp file) in multiple subfolders using arcpy's describe.SpatialReference. If i run this code, i am getting this error. ...
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0answers
25 views

Which PCS to use with WGS 1984 datum? [closed]

I am working on building a Modelbuilder tool to convert a .csv file with lat/long values into a polyline with shape_length. The dataset is in the WGS 1984 datum. It is my understanding that this must ...
3
votes
1answer
95 views

Change the actual coordinates in a shapefile (QGIS)

I'm trying to map data for a county in Texas. The data were provided to me in a shapefile, and I've been working with it in QGIS 2.14. My problem is this: The coordinates in the shapefile I was given ...
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0answers
29 views

How is Reprojection done in QGIS [duplicate]

am using QGIS 2.14.1: How i Reproject a point dataset i have into a different format? eg. wgs84 to local system Am New to QGIS, Switching from ArcGIS to QGIS
3
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1answer
26 views

Default transformation for a EPSG CRS

Is there any way to know which transformation, from available, is the default transformation for a CRS in the EPSG database? For example, EPSG:4230 has more than 30 transformation available and ...