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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2
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1answer
89 views

Adding spatial reference to raster data using ArcGIS Pro?

New to ArcGIS Pro - I want to add a spatial reference to a raster file I have downloaded (in this case from Nearmap.com). When I click properties of the raster file through the new project TAB in ...
1
vote
1answer
69 views

Finding adjacent grid squares in MGRS/USNG

Given an MGRS grid reference, for example 4QFJ123678 (100m precision), is there a good way to obtain the adjacent squares (north, south, east and west) from that origin square? Is it better to ...
1
vote
1answer
101 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 ...
0
votes
0answers
66 views

Generate tile package with SRID 31468

I want to show feature layers from shape files with srid 31468 using ArcGIS runtime. I want to use a custom raster base map. For that reason I successfully create a .tpk file using ArcGIS desktop. ...
1
vote
1answer
55 views

How to georeference two pictures that do not have crs in QGIS

I would like to take aerial pictures of my research plots an caculate NDVI and NDWI. How do I do that in QGIS?
2
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0answers
34 views

How do I trick QGIS's map composer into chopping off the 000's in UTM coordinates?

In QGIS 2.8 (ubuntu), you can create a map with ticks and labels. I want the first two digits to be smaller sized, the next 3 to to be normal sized, and hide the last 3 digits. QGIS does not offer ...
1
vote
1answer
54 views

WKID matching EPSG

Is there a way to matching the code of ESRI WKID with EPSG code? I'm trying to find the coordinate system of PCS Name = CGRS_1993_LTM. Which has WKID:102319 code. But I donn't know the EPSG code.
1
vote
1answer
74 views

Trouble buffering a vector layer in QGIS with PyQGIS

I am working on a script that imports a .csv layer that has lat long coordinates, which I then want to buffer in feet. I've created a vector layer from the .csv file and tried to set the coordinate ...
2
votes
1answer
441 views

What coordinates are expressed in 6-7 digits numbers?

I am processing XML documents containing geographic information, and even though they are coming from the same source they are using different coordinates units. The first one is a regular ...
0
votes
0answers
43 views

How to Transform Many Projections Into One With SQL Server

I know very little SQL Server, but am quite familiar with Arc and Python. The data I want to transform is point data which is in a single table [ID], [X] [Y], [COORDSYS]. There are 5 possible ...
2
votes
4answers
110 views

Calculate percentage of land cover within a buffer in meters, not decimal degrees

I am trying to calculated the percentage of land cover within a buffer area (3000m) around my coordinates. My output is in decimal degrees but I want it in meters or at least that I can calculate the ...
2
votes
0answers
84 views

QGIS 2.8 Raster Layers Moved [duplicate]

I recently downloaded QGIS 2.8 and opened an existing project in it to check how it handled it and make any changes required. This project includes several raster heatmap layers. My problem is that ...
1
vote
2answers
64 views

How to project WMS layers from GCS_WGS_1984 to UTM ED50 31N using ArcMap?

I'm using a WMS service to open different layers. Specifically I'm using this link: http://w24.bcn.cat/WMSBaseGuia/request.aspx I have the following problem. When I open these layers with Arcmap, ...
0
votes
0answers
48 views

CRS, pixels, and floor diagram

I am trying to create a building diagram for use in a DevExpress map control. My goal is to display a raster image background in the control with a vector overlay that defines features of interest. ...
9
votes
2answers
1k views

Why are heatmaps on qgis 2.8.1 produced in the wrong CRS?

I noticed that the heatmap calculation on the new upgrade version of qgis is given the raster map without any coordinate system. Have you got the same problem?
3
votes
1answer
29 views

Do I need to transform wind vectors when changing projection from EPSG4326 to EPSG24373?

I have a set of points and polygons given in "normal" lat/lon coordinates EPSG4326, which I need to transform to EPSG24373. I can do this without problem using PROJ4. However, I also have wind ...
0
votes
1answer
145 views

Shape file fails to import into Google Earth Pro

My shape file fails to import into Google Earth Pro. Is the map projection of my shape file to blame? When I heard Google Earth Pro was now free I thought it might be a good tool for non-GIS people ...
1
vote
1answer
53 views

Rotation matrix in the EPSG

I use Proj4j for a WebGIS and I have to create a new ESPG. I tried on QGIS to convert coordinates from a local system (in Greece) to a world coordinates system. First, I have to do a 2D ...
0
votes
0answers
35 views

Projecting NAD83 on-the-fly to WGS84 [duplicate]

I have a point feature class in a geodatabase that uses WGS84 as its SRS. A colleage of mine created points in this feature class using an external database containing lat and long values. However, ...
2
votes
2answers
129 views

Assigned projection and an unprojected WGS84 geographic coordinate system

I am to be submitting a shapefile for review but the first two requirements have me confused. Are these requirements conflicting or am i just not understanding the question? Requirements: The ...
1
vote
1answer
95 views

Baidu Maps SRID?

I am making an App which will make use of Baidu maps for geofencing and other features (as the app will be released in mainland China) I am using GeoDjango, with Postgresql / PostGIS / Proj4 etc.. ...
1
vote
2answers
58 views

Transform from artificial coordinate system to a real one

I have spatial data generated in an Archaeological excavation which is in an artificial coordinate system and I want to convert it to a "real" coordinate system. To do this I took real coordinates ...
1
vote
1answer
104 views

ArcGIS. Coordinates conversion from WGS84 to Stereo70 is not precise

So I want to convert coordinates from WGS84 to Stereo 70 and it is not working precise. For example, I have the coordinates (20.2600, 43.6200) and in Stereo 70 should look like (448469.26,325966.67) ...
1
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1answer
53 views

Can layers with different extents in arcmap 10 be made to line up?

I am currently trying to get some insect sampling coordinates that are represented by points to project on top of a polygon that shows all the different plots of land in a ranch. The coordinates for ...
3
votes
1answer
72 views

USA Contiguous Albers Equal Area Conic to miles

My data is in USA Contiguous Albers Equal Area Conic projection. How can I convert the USA Contiguous Albers Equal Area Conic projection to miles?
3
votes
2answers
143 views

How to define layer's CRS and avoid the CRS dialog in PyQGIS?

There is an existing Shapefile, which I want to add. At the moment my code looks like: self.iface.addVectorLayer(self.shpFilePath, "Track", "ogr") It works fine, but i want to define the crs ...
1
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0answers
40 views

How to check if error due to no spatial reference of extracted raster? [closed]

I have raster file without spatial reference and I extracted my area of interest by shapefile that has spatial reference. And finally, I got extracted raster with spatial reference. can i assume ...
1
vote
2answers
73 views

How can I make the UTMs of different datasets uniform?

I have wind datasets for every U.S. state and want to merge them. I found out that these datasets use different UTMs. So I want to make the UTMs uniform. How can I do that? This can not simply be done ...
1
vote
1answer
67 views

Determining Projection using QGIS?

I am very new to QGIS and I am trying to determine the spatial projection and the units of distance of a certain raster file. The closest thing I can find is the CRS, which is set to some sort of ...
0
votes
1answer
41 views

Projection coordinate system [duplicate]

I have raster image that projected by WGS1984 UTM Zone 37N. But my shapefile was Adindan UTM Zone 37N. Due to this, it doesn't overlay the same. I tried to define projection for the raster image to ...
0
votes
0answers
63 views

Line length for line files

Using QGIS, Brighton 2.6. Trying to calculate line-lengths for linear features (roads, trails, fenceline) and used this post (How to find line length in QGIS while editing?) and the links associated ...
0
votes
1answer
28 views

Projection issues with merging files. [duplicate]

New QGIS user, 2.6 Brighton. My project CRS is default to Nad83ft / N.Carolina (US). I loaded various polygon and line (provided to me) that have various CRS's but they still show correctly in place ...
2
votes
1answer
117 views

How to project a GeoJSON on the fly in OpenLayers 3?

I have been trying to load a GeoJSON without success. I have a map with a background layer from OSM. I have some data in 4326 I want to overlay on that map. I do not want to transform coordinates one ...
0
votes
1answer
46 views

Changed Projected Coordinate System back to original but, Shape_Area field is still off by about 55 SF

I recieved some GIS parcel data a little over a year ago. This data is the basis for the majority of my work. About a week ago I noticed that the Projected Coordinate System had somehow been converted ...
1
vote
0answers
53 views

Unknown coordinates in Shapefile, projecting doesn't give expected results

I'm reading a Shape file (four files actually, .dbf, .prj, .shp and .shx) containing polygons representing certain areas in my neighborhood. For this I use C# and a library called DotSpatial. I can ...
1
vote
0answers
35 views

Geographic coordinate system and datum [duplicate]

I am bit confused about datums used to define a localised coordinate system for a specific area. Definitions say that, datum defines how a certain well-established point (i.e., reference point) on ...
0
votes
0answers
85 views

Calculating distances in Geographic Coordinate System using ArcGIS for Desktop?

I work in a Geographic Coordinate System and using the "Generate Near Table" tool in ArcGIS 10.2 for Desktop. I want to calculate the distances that each feature of the point layer has to the closest ...
1
vote
2answers
91 views

Shapefile created in QGIS will not display properly in ArcGIS

I was asked to created a point shapefile of a cemetery. The points display correctly in QGIS but not in ArcGIS. I think the issue is with the coordinate system I created it in (WGS 84 / UTM zone 17N). ...
1
vote
1answer
201 views

Postgis query to convert UTM to Lat long

I want Postgres/PostGIS queries to convert UTM coordinates from UTM 43N projection to Decimal Degrees 32643 projection. select ST_X(the_geom), ST_X(the_geom) from table
2
votes
2answers
112 views

Find unit of EPSG-Code

I need a way to find out the unit of an EPSG-Code (e.g: meter) from java (ogr, gdal, osgeo?) but any other approach would be fine as well. I want to do something like: if(epsg.unit==meter){ do ...
4
votes
1answer
114 views

Equal area projections with different area results in ArcGIS for Desktop?

Using ArcGIS, I have to calculate areas of huge polygons all over the Pacific Oceans betwwen 20N and 30S. I have been trying different Equal-areas projections (Cylindrical and sinusoidal for example) ...
0
votes
0answers
60 views

Mapfish print v3 returns org.opengis.referencing.NoSuchIdentifierException when using custom CRS

I'm trying to print in CRS, which isn't defined by default. I added definition of this CRS to epsg.properties, restart application and tomcat7 but still getting Error while processing request: ...
0
votes
1answer
61 views

What is the formula for converting from WGS84 to EPSG:3071 (Wisconsin Transverse Mercator)

I have GIS software that can do this conversion but I need to know the actual formula / math involved. I'm writing code and need to perform a single conversion (WGS to EPSG:3071) so using a library, ...
1
vote
0answers
38 views

Issues in projection while defining data frame extent by coordinates

I'm trying to set the following coordinates to a dataframe: custom_extent = {1:-87.678956, 2: -87.611652, 3:41.867129, 4:41.954932} where 1 is key for XMin, 2 is key for XMax, 3 is key for YMin, ...
2
votes
1answer
338 views

Define spatial reference of layer in ArcGis JavaScript API

I get an error "Map: Geometry (wkid: 3301) cannot be converted to spatial reference of the map (wkid: 4326)" when I want to add only graphics layer. I found that spatial reference for a map is defined ...
2
votes
1answer
73 views

NZTM: Add 10 meters to a coordinate

Say I have the coordinates: N: 5413457.7 E: 1528677.3 If I were to add 10 to the northing value would that make the new coordinates point 10 meters north of the original point?
0
votes
0answers
71 views

Four parameter Helmert transformation using four points

I'm looking for an algorithm to calculate a Helmert transformation using four reference points. Plus, does anyone know how I can calculate the error once I've completed the transformation?
3
votes
3answers
263 views

How to georeference a map in UTM / WGS 84 (geographic) to WGS84 / UTM?

I have scanned UTM WGS 84 toposheets, with a geographic grid. I want to georeference them in WGS 84 / UTM (therefore with UTM coordinates). Should I: Calculate the UTM coordinates from the ...
0
votes
1answer
40 views

Converting SWEREF99TM coordinates to the “standard” coordinate system (longitude and latitude)

I recently asked a question about a coordinate system in a file, and found out that it used SWEREF99TM, but I can't figure out how to convert those coordinates to the "geographic coordinate system". ...
2
votes
1answer
13 views

CRS dialog no longer opening

I'm new to QGIS, so supect this is trivial, but it has frustrated me for the last hour or more... Last week whenever I added a csv as a layer once I'd filled in the first dialog it automatically ...