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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82 views

How to find a datasets spatial reference and apply it to another dataset?

I'm struggling to use the describe function to find the spatial reference of a given shapefile and then apply it to another shapefile which has been copied to a projected folder. I'm relatively new ...
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1answer
27 views

Shape files are not lining up [duplicate]

I have two shapefiles, with the same projection but they can not overlay. I understand that the extent is different, but i can not figure out how to change it? Here are the tow layers properties :
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2answers
201 views

How do I set a CRS when it isn't listed in QGIS? (Mac, not PC)

I want to work with a shapefile that is in a Coordinate System that I can't locate in QGIS for Mac. When I load this shapefile data, it shows up fine, on-the-fly has generated the CRS data most likely ...
4
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1answer
194 views

How to bulk import ESRI projections into Postgis

Where can I get a file that would allow me to bulk upload all of the ESRI projections into the spatial_ref_sys table of postgis. I know that you can get insert statements on spatialreference.org; ...
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2answers
575 views

How to debug GeoServer HTTP response code: 400?

We are using opengeo 2.4.3, and trying to open some layers with GeoServer through WMS. The different layers in the WMS file are detected, but when doing 'layer preview', we get the following error: '...
2
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1answer
36 views

Representing coordinates on non-earth globes in semantic data

There are standards to represent geospatial data in the context of linked data, such as GeoSPARQL. However, I could not find a way to represent the coordinates that are not on Earth - such as, for ...
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1answer
43 views

I want to have two raster data sets overlay

I am using ArcGIS 10.3 I have 2 raster datasets with different coordinate systems, but they are the same county (just different databases). When I add them to the same map layer they are far away ...
2
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2answers
115 views

How to create a QGIS map of unprojected data?

I am attempting to display data generated by Ubisense technology. The data contains non-geographic x y coordinates. I would like to load this data into a QGIS project to perform analysis. Is it ...
2
votes
1answer
43 views

Geotools produces different GEOGCS value for ESRI WKT

ArcMap creates following contents in .prj file for WGS 84. GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137.0,298.257223563]],PRIMEM["Greenwich",0.0],UNIT["Degree",0....
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1answer
97 views

Guessing unknown projection in Malaysia

I have a database of northings and eastings of boundary markers of land parcels that are in a form that I cannot pin on any format. I would like to perform some conversions on them so that they can be ...
4
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4answers
138 views

How do I create a map that is not to scale in QGIS?

I want to make a map that isn't to scale and I'm so used to being pedantic about CRS and scale that I don't know where to start. The map that I need to make is a simple guide for people to get to a ...
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1answer
1k views

Using customized Coordinate System for Archaeological site data

I don't know so much about coordinate systems... In my office we use to deal with spatial data coming from archaeological sites. Each site has its own x-y-z coordinate system (GCS). Three simple ...
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0answers
32 views

Problem with reference system

I've imported in QGIS two vectors and setted the same reference system. First is a shape file, second is a csv file. The problem is that they are in different places, but they should be one over the ...
13
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2answers
564 views

Which projection is this data in?

I received a shape file for my project from an agency and was told that they always use UTM. However, the values have too many digits for being projected in UTM. min max x 32507319 ...
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1answer
73 views

watershed delineation using ArcSWAT

I want to delineate a watershed using ArcSWAT tool. Upon uploading the DEM from disk a window pops up & says: Dataset must have a projected coordinate system. The current coordinate system is ...
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1answer
72 views

orthogonal projection of a point onto linestring in PostGIS

I am trying to find the orthogonal projection of a Point (in 4326 SRID) onto a LineString (in 4326). The picture shows the objective. I have tried to use ST_Distance function, but in this case the ...
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0answers
20 views

Proj4 WKT - Cartesian with origin to EPSG900913

I'm converting wgs84 to cartesian with origin using simple function in c# public static double[] LL_TO_XY(double latitude, double longitude, double originLatitude, double originLongitude) { ...
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1answer
53 views

metes and bounds from historic plans

I have an historic map from 1912 in feet and has metes and bounds displayed. I am going assume one point on the map (a lot boundary intersection) is the same as it is now and then use the metes and ...
1
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1answer
20 views

Error using gdalwarp in EPSG:4326

I tried to change the projection of AMSR-2 in Python using: 'gdalwarp -geoloc -t_srs EPSG:4326 C:\GW1AM2_201301311114_050A_L1SGBTBR_1110110.vrt C:\test100.tif' It said there are something wrong ...
2
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1answer
120 views

Identify coordinate system used near Kuala Lampur

I have some coordinates that were given to me, and I do not know much about how they were taken. I thought they were UTM coordinates, but when I try to convert them using some online tools I always ...
2
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1answer
109 views

Coordinate transformation differences in ArcGIS, QGIS and Google Earth Pro

I have a shapefile with points in Adindan UTM 37N coordinates. Now there seem to be roughly two ways of converting those coordinates to WGS84. When loaded in Google Earth Pro the points are about ...
0
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1answer
47 views

Do different RDMS use different SRID's to identify the coordinate system of a spatial object?

I'm looking for a reference that lists a standard SRID for a given CRS. Do RDMS's utilize a standardized SRID, such as OGC? Or is it unique to the RDMS?
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1answer
276 views

Convert longitude/latitude to pixels on the map

I have a map from here. I want to be able to simply convert arbitrary lon/lat pair to pixels on the map (also the ability to do reverse conversion). The maps come with .tfw file and projection info, ...
2
votes
1answer
52 views

Equal area world QGIS

when I use ArcGIS I normally use CRS: Cylindrical Equal Area (World) WKID: 54034 In QGIS I cannot find the same projection. When I re-project my file in ArcGIS and open it in QGIS it says I am using ...
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0answers
49 views

Convert EGM96 gps elevation to WGS84 ellipsoid elevation.

I have GPS elevation data (300k points) in EGM96. These points are located on the East US coast. I realise i need to work out the difference between the EGM96 and WGS84 ellipsoid in this region to ...
0
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1answer
32 views

How do i identify unknown coordinates reference system for my data [duplicate]

I have several shapesfiles which perfectly overlay but the coordinates reference system is unknown. I need to overly these with other data in a different coordinate system. I tried initially to ...
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0answers
26 views

Can I assume that ENU Coordinate are already projected?

I have an application where I need to track a vehicle position in range of max 50km. I implemented the ENU coordinate system so my future calclutaion would become easier to impelement (e.g. generating ...
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2answers
82 views

Datum shift issue between OSGB1936 and WGS84

I have to work between OSGB1936 and WGS84 and BOTH of these data sets started out life as OSBG1936 BounaryLine data. I thought I was just at the end of a full revision of my master mapping until I ...
1
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1answer
58 views

MySQL database layers invisible in QGIS

I'm encoutering a problem when connecting a MySQL database to QGIS. When the connection is established and a layer is imported, the layer itself will not render and thus isn't visible. The layer ...
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0answers
51 views

what is the corresponding projected coordinate system to WGS84? [duplicate]

Possible Duplicate: Global DEM to Slope calculation I want to calculate the slope from my global DEM?the DEM has WGS84 projection(degrees).In order to correctly calculate the slope from DEM,it ...
3
votes
1answer
46 views

How does the offset values of LAS files relate to their coordinate system?

I have a conundrum concerning LiDAR data, the stored point offset, and the coordinate system. I process large amounts of LAS data in TerraScan (TS), which sits on top of Microstation (MS). I receive ...
0
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1answer
130 views

Projection Transformations [duplicate]

Possible Duplicate: How can I measure area from geographic coordinates? I created my spatial tables in WGS-84 with SRID:4326, I want to transform them to UTM Projection to measure length and ...
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0answers
4 views

Shifted shapefiles with same coordinate system in ArcGIS [duplicate]

I have a strange situation with one of my GIS projects. I received from a client three shapefiles in the same coordinate system (Stereographic 1970 - a projected system). All three files should align ...
1
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1answer
59 views

Digitized GIS Data - Wrong Coordinate System, Right Location

I (correctly) georeferenced a JPEG to an existing shapefile that was in the correct coordinate system. I then proceeded to create line feature classes by manually tracing some of the features (roads)...
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votes
1answer
97 views

Difference between CRS(Coordinate Reference System) and SRS(Spatial Reference System)

I could see that CRS and SRS are referred as different components in this question Is WGS84 itself a Coordinate Reference System? Could anyone please explain whether CRS and SRS are same or different?...
1
vote
1answer
27 views

Importing USGS ned30m (NAD83) into Project (NAD83/Conus Albers, OTF on): coords still Lat/Long

I apologize for posting yet-another-gis-novice's confusion about CRSs, but I have researched the issue and am surprised by what I'm seeing. In simplest form, I open a new project set On-the-fly (...
1
vote
1answer
37 views

CRS problems with SwtMapPane

I'm quite new to geotools and I'm trying to get to grips with it. Trying to load some shapefiles (see attachment) into a MapContent which in turn is associated with a SwtMapPane I always get an ...
2
votes
1answer
79 views

Does ETRS89 and UTM use the same zone (longitude and latitude)?

I'm building an app for the european country Denmark exclusively and I need to retrieve some geospatial data from a (geo)server. I'm currently trying to determine whether UTM and ETRS89 uses the same ...
4
votes
1answer
125 views

Point Coordinates Conversion with unknown system

I've been using QGis for few weeks now. Although this site always came very helpful, I can't find solution to my recent problem: I have few points, and know their coordinates in "WGS-84" and "ISN-93" ...
5
votes
1answer
56 views

Pacific-wide Projection for distance?

I have a data set of ~3500 points located across the Pacific Ocean, and am looking to measure the distance from each point to it's nearest coastline to identify the "host" country. I had originally ...
1
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2answers
60 views

Transformation from EPSG 31983 to EPSG 4326 change only one axis (R + ggmap)

I'm trying to convert my shape file with spTransform(), but it's not successful. I don't know why it's changing only one axis. I want to change the axis into decimal degree. # Libraries --------------...
0
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0answers
16 views

Inconsistent coordinates of centroid were found using the given value of radius of curvature in the prime vertical and in the meridian

I am currently writing a function on geodetic datum transformation in Hong Kong by referring to the Explanatory Notes on Geodetic Datums in Hong Kong by the Survey & Mapping Office of the Lands ...
5
votes
1answer
180 views

How do you check if two feature classes have the same spatial reference?

Using arcpy, how do you check if two feature classes have the same spatial reference? Just checking if the two are equal doesn't work: >>> import arcpy >>> fc1 = r"C:\Users\e1b8\...
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vote
1answer
32 views

Grid clipping issue in Layout

I'm having an issue making a figure for a poster with ArcMap. I'm trying to make a grid that follows the map boundary in a Lambert Conical projection, and it's not coming out right. The map boundary ...
1
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1answer
299 views

Dynamic defining of transformation type for ISpatialReferenceFactory.CreateGeoTransformation call [duplicate]

Suppose given a point (IPoint) in some coordinate system. Required to transform it to another coordinate system. If both of coordinate systems are predefined, we can use IGeometry2.ProjectEx with ...
2
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0answers
36 views

Why is grid north so offset? [closed]

I am not a GIS professional, only a casual orienteering enthusiast seeking an explanation from experts. The plat of my property gives bearings and distances for each of the lines, as does the deed, ...
3
votes
1answer
105 views

Disparity between QGIS and ArcGIS for Desktop georeference results?

I am georeferencing a static map in JPEG format. I would prefer to use QGIS for a variety of reasons. I've never georeferenced with QGIS before, so I may not have the process quite right. I ...
12
votes
1answer
7k views

GDAL/Python: How do I get coordinate system name from SpatialReference?

In Python, using GDAL, I've extracted a raster's projection as a WKT string as follows: wkt = dataset.GetProjection() # wkt is 'PROJCS["GDA_1994_Transverse_Mercator",GEOGCS["GDA_1994",DATUM["GDA_1994"...
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1answer
78 views

Using Postgis spatial index in st_distance operation based upon explicit SRID column

I have two large tables with data that spans over multiple regions of the U.S and needs a defined SRID column in atleast one the tables to denote which coordinate system should be used for area/...
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2answers
127 views

Why do my XY cordinates not make sense / show up in ArcGIS 9.3?

In the Add XY Data menu I selected to add a table containing UTME and UTMN coordinates. I selected a WGS84 projection b/c that's what the GPS device that meade the readings was set to use. However, my ...